Gozen 2-ji made Kimi no Mono

Michio has liked his close friend Kyouichi ever since their school days. Having never confessed his feelings, their platonic relationship continues as he turns 21. When Michio awakens one morning, he finds the world around him unfamiliar. He is 29, and the sleeping face next to his is... From Waku Okuda comes a lovely, heartrending, post-midnight countdown love story.

(Source: Shinshokan, translated)