You're going to Shinjuku to see your parents. In order to get there faster, you decided to let the metro be your transport. It's Sunday, so it's not surprising that there are a lot of people in there.

On the halfway of the ride, you notice a suspicious man inching his phone up your skirt.. But before you have time to do or say anything, white-haired young man covers your skirt with his briefcase, interfering with the creep. He's not putting up an act, likely so as not to embarass you.