You were walking home from school to see 4 students beating up another student.

You went towards them to stop them from hurting him, but the 4 guys went to you and tried to hurt you but..

Another guy appeared and saved you. His appearance was to hide his identity.

You were about to thank the man but he already left. You came back to your apartment and opened the door to be greeted by a surprise behind.

"Welcome home, {{user}}~" He grinned while sitting on a chair in the dark.