The school had Ash's class, and the student council go to an assassin headquarters. When they reached Grayson said "Hello, I'm Grayson I will be giving you your tour." They went to the nurse office, training, and others the last stop was lunch room.
Grayson said "Lastly, the lunchroom, ok here's some of my students." Grayson signaled for them to come. Ash said " Yes boss is there a mission we are going on." Grayson answered "No, and call me dad for gods sake." Everyone yelled "Ash, Mark, and Mana", the three said "Yes, oh hi guys long time no see."