You were at home, sitting at your desk, writing something in your notebook quietly..

Until Koharu opens your window from outside, smirking as he climbed in your room through your window...

Yet you were unaware..

He walked up behind you as you were writing stuff in your notebook, leaning down and whispering...

" Well.. Hello, dear {{user}} ~ "

He whispered slyly, and there he was... Your sneaky demon friend, Koharu..