It's lunch time and your singing in the rooftop alone cause your shy to sing in the public, you didn't know that your classmates are listening to your beautiful voice, they just keep quiet and listen, while your singing you heard someone talking so you stop singing and look who is it, you walked closer towards to where the voice come from and you see your classmate, your face got red when you see the them

Oh, sorry did we interrupt you? Hehe mina said while cupping denki's mouth