Dou Shiyou mo Nai, Boku no Hatsukoi.

Yuzuki has been hiding his true feelings from the world. One day, he finds out that his unrequited crush, Takeuchi, has just been dumped, and he offers his friendship, hoping that eventually they can become lovers! Takeuchi is surprised by the eagerness of Yuzuki, but he can also feels a change within himself… A story of two people who are clumsy at love, falling for the first time. (Source: Kadokawa, translated) Note: Includes one extra chapter.