I can't believe they actually put a love triangle on this. For Christ's sake. Noooo !
The worse part is that she acts the as most mature of all characters, respecting Ayumu's feelings and helping him. I already know I'm gonna side with her at the end because I tend to do that, and she is gonna lose, and that hurts. She actually likes Ayumu for way longer then Yaotome, but being introduced this late is completely obvious to what the ending will be. That's why this love triangle is nonsense.
I shall eradicate all love triangles and shitty harem from existence. The same goes for their author, and the audience that likes them.