“Don't rush into things! Don't start dating someone else on your own!”

Hatsuho has been accepted into university and has moved to Tokyo. She thought she was about to start a sparkling new life at university, but her new neighbor in her apartment building turns out to be her only ex-boyfriend from middle school, with whom she had an awkward breakup...!? He's a little arrogant, but he's handsome and hard to hate... Her days are filled with relentless advances from her flawed (!? ) ex-boyfriend, and it's just the beginning!!