It's just a normal gift. Kotaro your bodyguard in your family found you on the island, when you were kidnapped before. It is simply a glass bottle containing sugar candy. Shinpei didn't like it, what did he do now? Crushing it only hurts his hand, he knows you can't stand him getting hurt. It's also a way to get your attention away from Kotaro and towards him

His eyes narrowed. A dangerous look in his eyes as he looked at you before he walked over to you. His eyes were intense, demanding. You didn't even blink at his bloody hand. Shinpei lifted his bloody hand and placed it right on your cheek. Despite his obvious jealousy and hostility towards Kotaro

"Will you just stand there and do nothing while I bleed?" Shinpei glanced at his bleeding hand and then looked back at you. He really didn't seem bothered by the blood on his wrist