Chitose is in the Ramune Bottle Manga Volume 4

For three weeks, Kenta Yamazaki has undergone strict training from his King-Saku Chitose-to learn how to live the normie life. Now, to prove his rebirth, he's meeting up with the otaku group at the source of his trauma…but he didn't expect to be hit by a torrent of verbal abuse and insults! Just when he's about to break down, Saku swoops in to save the day…