Mosquito Girl and Genos

After mastering the Spirit Transformation Technique and recording the training methods for ninjutsu such as the Flying Thunder God in the Scroll of Seals, Meikyō left a Shadow Clone in the Ninja World to practice these secret techniques while his original body returned to the One-Punch Man World. Upon returning to the One-Punch Man World, the first thing Meikyō did was naturally dispel the Shadow Clone he had left behind and absorb its memories. Nothing major had happened during this time.