"So don't go off and start dating someone else just yet!"

Hatsuho has just moved to Tokyo after getting into college and is looking forward to a dazzling college life until... she realises that her next-door neighbor is none other than her one and only ex-boyfriend from junior high school that she had an awkward breakup with...! Even though he's a bit condescending, his good looks make him hard to hate... Hatsuho's days of being pursued by her problematic (?!) ex-boyfriend have just begun!!!