The cover: Age difference + Living together = love ... sorry but NOPE!
I'd tolerated a little IF at least she'd be a 1st year college or if he'd be a college student (not sure about his age tho, only know he's already a working adult: read only the 1st ch) but no! Author decided to make it looked like a 16 yo girl with a 20-something MAN is romantic
Living no Matsunaga-san