The game title means "I'm the friend". Why? (I'll tell you.)
In a galgame, the MC always has a friend character who exists merely to help him, typically by offering information, win the hearts of heroines. Now image you are the friend character. That's the theme of this game.
But worry not, this is a pure-love game without damning NTx.
And the first set of CGs already tell you why. You guess who the "boy" with wig is?