I get that Mahiro has her circumstances, but I really don't have much patience for her heartbreak, since she really did it to herself. She spent years with Yukawa, but in that time she never worked up the courage to confess herself. Now that her friend is having relationship issues and someone else has done the hard work of making Yukawa realize she likes girls, she tries to exploit that for her own selfish benefit? That's really not okay, and a shitty thing to do as a friend.