It's a manga about two childhood friends and the main character has been in love with his best friend. One day, the friend told the main character that he wanted to try doing with him even though he was straight. The rest of the story consists of those two having a sexual relationship, until the main character lies about dating the school president. Can anyone help me find this manga? Thanks!

Sounds a bit similar to Yabai Kimochi?

Mousou Elektel