Hatate Sota is a high school boy, who has an ability to visualize "flags" for future events such as "death flag", "friendship flag", and "romance flag". Despite the flag-viewing ability, he avoids making friends with others due to a trauma he experienced in a ship submergence accident. Four beautiful girls get interested in his strange way of living, and they begin to live with him at the school dorm by force.

Episode 1 - I'm Going to Marry Her Once I Leave This School

Episode 2 - Girls are in the Dorm. But I can't say it yet. Wait Until Tomorrow.

Episode 3 - Leave it to Me, There is a Chance We're Going to Win This Athletic Meet

Episode 4 - We're Almost to the Goal. The Track Meet 'll End Just Fine.

Episode 5 - Believe and Wait for Me. I'm not Going to be Late for My Date With Everyone.

Episode 6 - Phew. Don't scare me like that. I guess you're just a little sister.

Episode 7 - I Learned Something Amazing. I'll Hide Myself Before I can be Erased

Episode 8 - I'll catch up to you. Have I ever broken a promise to you before?

Episode 9 - Someday, it'd be Nice if We Could all Go to a Festival Together Again

Episode 10 - Hold this for Me. The Winner of the Beauty Contest is Written Here.

If Her Flag Breaks