My personal favorite headcanon is that one of Yuu's biggest kinks is pleasuring Mika. He literally wants to drown him in love so much that he gets off to Mika having the time of his life during sex
YESSSS ANON YESSSS Yuu is such a giver during their time together. He always asks Mika if it feels good, what feels good? Here? What do you want me to use? My fingers, or mouth? Mika flushes with each question. After, Yuu begins praising and complimenting Mika on everything. The way his hair feels, the softness of his skin, the beauty of his face, the sweet sound of his fluttering heart, the way his body writhes under him. He trails kisses down Mika’s body, repeating the same words over and over: I love you. Mika basks in the attention, in the pure affection Yuu showers him with, and he truly does feel loved.