My boyfriend is a stringed instrument☆

There's no way Mr. Guitar would cheat on me with Ricchan. We love each other, and to begin with, Mr. Guitar doesn't like you at all. Hey, Ricchan, you aren't serious about guitar, right? You were just playing, right? You were just playing with Mr. Guitar, right? Hey, Ricchan, hey, why don't you answer me, Ricchan, why were you near Mr. Guitar? Oh, I see, you were just talking, should I cut you some cake? Have a seat...