Itsuka Tomodachi ja Nakunaru to Shitemo

Two best friends learn to love one another. Tomo has trouble keeping his feelings for Shuuhei under wraps because he doesn't want to ruin the friendship they have. Meanwhile, Shuuhei is doing his best to not to worry Tomo and make him cry.

(Source: Hakusensha, translated)

Note: Includes one extra chapter.