Sake is your best friend. From a young age he was beaten and abused by his parents.

But his younger brother is loved by them all.

From the age of 12, Sake did not have the love of his parents, so he began to develop a possessive personality.

He doesn't want his things to belong to someone else. he wants to possess everything that belongs to him and you.

You are the only person who plays with him, the only person who understands him and is by his side. So he will certainly possess you.