It's been two years since Junichi was stood up on Christmas Eve, which has scarred his heart and made him wary of love. While buying lunch for his friends, he helps Sae, a friend of his sister, Miya, which catches the attention of the popular school idol, Haruka. Later that afternoon, he goes to the library to meet his friend Masayoshi but encounters Haruka again and helps carry her books while she teases him before leaving with her friend Hibiki.

Because of Haruka's rejection, Junichi feels dejected and unable to sleep well. He goes to the infirmary to get some rest, but he unexpectedly finds Haruka resting there too. Despite what happened, Haruka is still interested with him which lifts his spirits up.

Ever since the kiss, the energetic Junichi has attracted the attention of the girls which makes Haruka jealous. He asks her to kiss him on the eyebrows again but instead she brings him to an abandoned water pump shed where he kisses her behind her knees like a puppy.

Junichi decides to ask Haruka out on Christmas Eve. While asking her out, both of them realize that they have met before on Christmas Eve last year and cheered each other over their respective problems. Haruka refuses Junichi's offer, but instead invites him to her family's Christmas Eve party.

On the night when he was stood up, a heartbroken Junichi is about to go home when he meets his friend Kaoru. To cheer him up, she invites him to her home to eat cake with her and her mother. Two years later, they remain friends who snark at each other. After punching him and bringing him to the infirmary, Kaoru asks Junichi to come to the flower garden after school.

As Kaoru is in denial about her feelings for Junichi, she gets into a fight with Keiko’s crush upon learning he made fun of the letter she wrote to him by showing it to his friends. Junichi stops her and follows her to the rooftop, where they talk about Keiko's romantic problems.

The next day, Kaoru doesn't come to school, worrying Junichi. Skipping the rest of the day's classes, he frantically searches for her at the places where they hang out, until he takes a clue from overhearing Hibiki and Haruka, and looks for Kaoru at her part-time job.

Noticing the growing attraction between Junichi and Kaoru, Masayoshi and Keiko decide to set the two up together by making them meet at the infirmary. There, Junichi tries to ask Kaoru out on a date on Christmas Eve, but to his surprise she has already planned to go out with him.

Junichi, still afraid to love due to a traumatic event that happened two years ago, sees a beautiful new student named Sae Nakata. He gets to know her eventually when he goes looking for her to properly thank her for finding his wallet, and his sister Miya eventually introducing him to her.

Sae's training to become a waitress continues with the help of Junichi and Miya, by practicing her speech skills and practicing how to change uniforms in three minutes--where Miya catches her, in a swimsuit, and Junichi in a compromising position when Sae tripped.

Though confused as to what Sae told Junichi that night, her training goes on until the day of the job interview. She passed it, but when Junichi plans to "graduate" her, she refuses, stating that she wants to become her student forever. Junichi is happy to see Sae in her part-time job, though still confused with her.

As Junichi decides to tell Sae how he feels for her, Sae invites him to a restaurant that serves a special parfait--one that could allegedly turn a couple into lovers by eating it. On the day of the Best Couple contest, however, Haruka and Hibiki wins first place--although Junichi and Sae, in wedding attire that she designed and sewed herself, comes in a close second.

On the night when he was stood up, a heartbroken Junichi heads home and meets a young girl rushing home with a present for her brother. Two years later, Junichi and Masayoshi heads home where Junichi encounters the girl he met two years ago, now with a cold attitude.

Junichi, Kaoru, and Masayoshi head to the library to see the new Library committee member, but cause a ruckus there until Ai scolds them. Junichi later offers to teach Ai maths upon learning she’s taking makeup exams. While both of them are taking a break, Ai asks Junichi on what to do with her younger brother, Ikuo, since Junichi acts childish just like him.

Junichi invites Ai and Ikuo to go to the amusement park but only the former two go after Ikuo gets sick. While entering the haunted maze, Junichi starts hallucinating bizarre things around them until he snaps out of it after biting Ai’s finger. As they head to the park where they first meet, both of them ride the swing together where Ai stops it and kisses Junichi, leaving him flabbergasted.

As Tsukasa formally opens the Founder's Festival, Junichi is helping Ai out at the Swim Club's oden food cart, where they sell out their wares, even gaining praise from the Tea Club. At the end of the festival, Ai takes Junichi to a hill with a hot spring owned by her grandfather.

Two years ago, Junichi asked his childhood friend Rihoko, to come and help him select a present for his date on Christmas Eve. Rihoko, who had an unrequited love for Junichi, was sad to find out later that he was stood up. In the present, Rihoko takes a shortcut to school through a hole in a fence, but gets stuck until Junichi helps pulls her out.

Rihoko tries her best ice skating with Junichi, unaware that it’s a part of Kanae’s plan to get them together. At school, while Rihoko sends in the Tea Club’s application for the Founder’s Festival, Junichi meets Manaka and Ruriko and helps them carry a kotatsu to their club room.

With the festival over and the school cleaning up, the Tea Club invites Junichi for tea as thanks for helping them where the latter gets interested and learns how to make tea from them. While eating at the restaurant where Kaoru works at, Rihoko asks Junichi to accompany her to go the local shrine on New Year’s Eve.

As the new term is about to start and graduation coming soon, Rihoko works hard to recruit people to join the Tea Club before Manaka and Ruriko graduate. During Valentine’s Day, Rihoko gives Junichi a box of chocolate cream puffs. As he eats them, she asks him if there is any girl he would like to receive chocolates from which he in turn asks if there’s anyone she wants to give them.

Still in pain after being stood up a year ago, Junichi decides to skip the Founder’s festival when Masayoshi catches up with him and invites him at his house. A year later, Junichi decides to change himself, and he starts by volunteering as Tsukasa's assistant for the Founder's Festival committee, to everyone's surprise. Junichi is amazed with Tsukasa's work ethic and the work she does.

Tsukasa drags Junichi to the local shrine and learns he never really read her notebook. However, she blackmails him to keep her other personality a secret. But when he tries to talk about it with Masayoshi, Tsukasa catches him red-handed and forces him to work very hard in helping with the festival. While working late one night, Junichi finds Tsukasa painting one of the festival’s attractions.

With the festival behind schedule and Tsukasa's health worrying her, Miss Takahashi suggests they cancel some events, but Tsukasa assures her the festival will be ready unchanged. Knowing that the festival committee is short of manpower, Junichi manages to convince Tsukasa to get their class to help.

Despite the cheerful atmosphere going into finishing work for the Founder’s Festival in time, Junichi is sad about Tsukasa, and plans to ditch the festival again. But when Masayoshi reveals to Junichi about a girl he never got to confess at grade school, he tells Junichi not to make the same mistake as he did, inspiring him and regaining his composure.

A shy girl named Risa Kamizaki confesses to Junichi, which the latter accepts and agrees to become her boyfriend, but she wants to keep their relationship a secret. Junichi wants to go the Founder's Festival with Risa and wishes to introduce her to his friends, but, after some thinking, she refuses.

Miya is concerned that her brother Junichi is going to be hopeless and lonely man in the future but is shocked when her friends Sae and Ai tell her Junichi is a nice and helpful person. Wanting to confirm if Junichi acts differently at school, she spies Junichi with Tsukasa, Rihoko, Kaoru, Haruka, Ai and Sae which proves it.