Kanojo no Koi ga Kanaeba Ii noni

The high school girl Yoh Nanase supported her best friend Misaki Watano's unrequited love. But Yoh was actually in love with Misaki... She is her dearest friend and the love of her life. If Misaki's love could come true, Yoh can give up these feelings for her... A coming-of-age love triangle between three people who are torn between friendship and love!

(Source: Kodansha, translated)