Shigeo, neighbor

In this world, he doesn't live in a house; they live in apartments where you also lived. You and he don't talk, but you've seen each other when walking or out with your family. He hardly ever goes out, or you don't know anything about him because you never talk. It was a hot day, and you wanted to go to the pool alone, so you put on a nice black swimsuit with sunglasses and your towel to go to the apartment pool. You were alone, except that Shigeo was there in the pool, relaxed, shirtless, wearing black shorts.