ONE PUNCH DxD (One Punch Man Male Reader X High School DxD)

[Discontinued] You are Saitama's adoptive son, one day you, Saitama and Genos were returning home from the supermarket, until you three stumble across a weird looking creature making random portals. Since this monster is new and never seen before, you decided to go an fight it while the Saitama and Genos watch. Charac...