In Crossover Anime, All the Characters You Support Have to Call Me "daddy"!

One day, Song Shuhang accidentally joined a chat group for veteran chuunibyou (middle school syndrome) sufferers. The group members all had avatars of certain anime characters and talked about strange topics—Chihaya Aine: [Family, just arrived in London and assigned to the Badger House. Does anyone know how to make the Pointon potion?] Mech Warrior: [Has anyone played "Cosmic God"? Why is Gaia's stats lower than Thunderbolt's? Do I have to go to jail for a second transmigration? This is truly speechless.] Lu Mingfei: [Uh... does anyone know what the hentai world is? I have a blond guy next to me who looks a bit too strong, and three incredibly beautiful older sisters with him... huh? Holy crap! Am I the victim? Song-ge, help me!] Toyokawa Shoko: [My Maybach was hit by a Yonhap. Where is Kassel?] At first, Song Shuhang thought everyone was just having a chuunibyou moment and doing cosplay online. It wasn't until various videos and photos were uploaded to the group chat by other members that Song Shuhang realized they really seemed to be time travelers. So the question is... if they've all time-traveled, how far behind am I? Suddenly, a group of people shouted in his ear, "Sir, we are willing to go with you!"