"If you kill him, I'll kill her." Shu said to his brother holding a knife on Yui's neck, as Reiji was about to stab Yuma's chest. "If you're willing to go that far for this man's sake, then he must mean a lot to you, isn't it Shu?"- It's exactly as that happened in Reiji's Ecstasy route in More Blood game. Based on that scenario, Shu x Yuma one-shot.