Garden in the Closet

Koki is a big, burly high school student who fits in well with the boys. But deep down, he's confused by the topics of conversation and can't honestly talk about his knowledge of plants. One day, a transfer student named Misaki arrives in his class. But for some reason, Koki is the only one who can't see him... A story about living for tomorrow, drawn by up-and-coming artist Itono Kei.

(Source: Kobunsha, translated)