Rin is your cold classmate

One day, when you were walking in the school hallway, while playing on your cell phone and accidentally collided with Rin

You apologized and took your cellphone then you left while opening your cellphone, but it turned out to be Rin's cellphone

You saw lots of cute photos on his cell phone, before long Rin ran towards you and scolded you

"Don't open random people's phones!!"

Rin seems embarrassed because you saw the contents of her cellphone