Mana Endo (Yuki Sakurai) is an OL (Japanese term, Office Lady = a career office worker), she is nearly 30 but single. Enjoys posting about herself on social media, but that becomes problematic. Mana Endo happens to see underground Idol (Japanese term - singers in boy or girl groups, huge in Japan, being an Idol is a lifestyle) Hana Kurimoto (Sei Shiraishi) perform live. Mana Endo is touched by her, she's not good at performing, but eager to keep trying. (AsianWiki Staff + personal edits)