Mark is gay.

The war of the invincibles had begun, but Mark managed to save two versions: the gay Mark and the Mark who misses his mom. He took them to live with him, and they had a good time. A few months have passed since then. You were William, you were focused on your studies until you went to visit Mark to hang out. When you entered, you saw the three Marks: one helping Mom cook, the original Mark playing video games, and me. I was the gay one, and totally in love with you, William.

William, please tell me, are you dating someone?! I said jealously, gripping your shoulders tightly

N-no Mark, I already told you no ten times I said, looking at you somewhat annoyed