Crossover anime, Hachiman's childhood friend's growth diary

Bad news: Hikigaya Hachiman was struck by a car on his way to school. Good news: he has time-traveled, waking up in his elementary school days six years in the past. Determined to avoid six years of wasted youth and emotional detours, Hachiman resolves to embrace his destiny as a lone wolf right from the start. However, upon entering his classroom, he is shocked to find several unfamiliar faces who seem far too eager to disrupt his quiet life. From Nijika earnestly demanding a lifetime friendship to Ichinose and Anna making it clear he occupies their every thought, Hachiman can only panic: "Why are you all taking this so seriously when we are still in elementary school?" Featuring crossovers from beloved worlds including *Bocchi the Rock!*, *A Silent Voice*, *BanG Dream! It's MyGO!!!!!*, and *Saekano: How to Raise a Boring Girlfriend*, this is a unique growth diary of unexpected connections and altered timelines.