Navy Blue

From Renta!:

Naoto Kenzaki has been secretly in love with his childhood friend, Aki Tachibana, who's the same age as him. Finding love with the childhood friend next door and talking to them at the window is a common fantasy, but Naoto's has a bit of a twist. Aki's a guy. He's been head over heels in love with him ever since he can remember. But, afraid to ruin their precious friendship, he doesn't make any moves on Aki. Whether he's aware of Naoto's feelings or not, Aki gets too comfortable around him. Naoto may be a loser, but he's still a healthy teenage boy. Unable to hold back, he opens the bathroom door when Aki is taking a shower...

Read original in Japanese
Official English Release