Wow. This is beatiful. Both story, and art. Especially for a smut. The art is immaculate, and the storyline is beatiful. Def a reread.
So uke becomes a sucubus, and asks his childhood friend to kiss n stuff or he dies, so yea. It escelates. They eventually confess and date. Its so freaking cute. I love this.
Chihira-kun wa Maryoku ga Tarinai