Plain, introverted high school girl Akari is stunned when, on the very first day of school, the popular and radiant Kiyosumi Runa suddenly hands her... a marriage registration form! Bowled over in shock, Akari leaves school early--only for Runa to show up at her house later. But when a torrential downpour hits, Runa can't return home, leading to an unexpected sleepover!?
With help from Omochi, Akari's imaginary-friend plushie powered by Akari's yuri-obsessed brain, one "case of extreme cuteness" after another unfolds...
Get ready for full-blown panic in this girl-meets-girl high school rom-com!