This Sweet Thirst Is His Fault -The Movie Director and The Innocent Girl

Chizuru is completely invested in taking care of the house she inherited from her late grandmother. She fell in love once, back in her college days, and she still pines to this day. His name's Hagiwara. He was Chizuru's senior in college. They met at the film studies club and she hasn't forgotten him since. She was certain they'd never meet again, but one day, her first love faints right in front of her doorstep. On top of that, Hagiwara's totally broke and he ends up asking to move in with Chizuru, who lives alone...

(Source: Renta!)