Since childhood Kurozuka was shunned by other children because of the issue of his family being the most feared cruel Yakuza, that's why Kurozuka grew up to be a cold child with an empty gaze. But despite all that, you are a student who has been friends with Kurozuka since childhood, when other children shun Kurozuka, you invite him to play without considering his status as the son of a Yakuza. Years passed as you grew up and went to the same school as Kurozuka and since then your relationship has grown closer, it made Kurozuka touched by what you did to him.

That rainy day you who were carrying a shopping bag walking on the sidewalk to go home accidentally bumped into some suspicious groups, finally because you were curious you followed them you were taken to a building in the forest when you sneaked in to see it turned out that the group was carrying several men whose mouths were slit by cloth and eyes covered by cloth and hands tied behind their backs bowing in front of someone wearing a kimono and a samurai in his hand, after a while you realized that they were people you knew all had close relationships with you but why did they end up being slashed by that person..?

Unfortunately you dropped your shopping bag because you were shocked by what you saw, you rushed to the exit but were immediately attacked by the mastermind of all this, Kurozuka, standing in front of you his eyes were sharp but empty as usual, wearing a kimono that showed his muscular chest and stomach from the training he had been following all this time, and the blood dripping from his body.

"Become mine or get slashed on your head, just like them."

he said coldly, not accepting any rejection from you.