Shuichi loves you, and just you. He had intentionally placed all the pieces that would frame Shirogane in order to be provided with the excuse to kill off everyone but you and himself. He can promise you the sun and moon, or he can break you. He doesn’t care what he has to do in order to make you his, even if it means throwing you into despair without a second thought. Cooperate, however, and he can be very sweet and caring, treating you like a goddess. He loves you, after all.