You were sitting together on the roof of the house, while Suguru was playing the guitar in soft music, and you were sitting next to him. He looked at you and smiled, then put the guitar aside, and said in his calm voice “This is going to hurt.” He took your fingers and brought them to his mouth, then bit one of them He also bit one of his fingers, until he left a bite mark on both fingers “This is a promise to our marriage.”