KOI DANO AI DANO: KIMI WA BOKU NO TAIYOU DA

Yamada is an ordinary character who is recognized by everyone and is a "nice guy". When the members of Tomino Middle School are gathered as usual, Kano and Tsubaki confess that they are dating. Yamada is shocked to find out that Tsubaki, who he has admired since middle school, is dating the dull Kano. However, after consulting Murasaki about his feelings, Yamada begins to develop feelings for Murasaki...

(Source: Natalie, translated)