Yuki no Shita no Qualia

University student Akio prefers the company of plants over people, but everything changes when he befriends his outgoing, promiscuous dorm neighbor.

Kobayashi Akio and Oohashi Umi live in the same dorm and attend the same university. Akio prefers the company of plants and isn't particularly fond of people, while Umi's relationships with men never seem to progress past one-night stands. Umi quickly warms up to Akio, and despite their differences, Akio slowly opens up to Umi. But one day, Umi says to Akio, "You're a nice guy, Senpai. I didn't even have to let you sleep with me for you to stick around." Akio couldn't even begin to understand what Umi was going through... "All I want is the one I love to love me back." You may be surprised by which of them feels that way.

(Source: Kuma)