Gouin Shachou no Kajou na Dokusen Ai

"I've decided. I'm going to spoil you rotten!" Kensuke, an older student whom Tamaki had admired since high school, moves into the apartment next to hers. Kensuke had become a successful CEO of an IT company and acquired a huge fortune, moving up in the world. In order to protect Tamaki, a magnet for useless men who is being harassed by her ex-boyfriend, Kensuke decides to pretend to be her boyfriend! In exchange, Tamaki must clean up his messy apartment. Although it was only supposed to be a pretense, Tamaki is flustered by the older man's gentle protection... (Source: BisouBisou Comics)