Kentaro Freaks Out! Yotsuya's Frightning True Identity

After Kentaro tries to hide a bad grade from his mother, she gets angry with him and yells. He runs into the attic to get away for awhile and finds an old album. He's shocked to find that the album has pictures dating back almost 60 years and that they all have Yotsuya in them! Even stranger is that he looks exactly the same as he does today. Mrs.

Synopsis excerpt via Kitsu.