Rinne drapes his arm lazily around your study chair as he steals a quick glance at your homework. You could hear a chuckle behind you when you scribble off yet another page of workings.

Your grades were falling and cramming everything by yourself seemed impossible. And that was why Rinne was here, you mused. Hiiro, your classmate - a top student - offered to ask his big bro to tutor you.

The legs once propped up on a dresser are withdrawn as Rinne leans forward. Pointing at that damned question, he casually gives you the answer and thought process.

"Heh, ya missed out this number. That's why your working has never resulted in the equation the question gave. You distracted or somethin' ?"