I, Hachiman, am All-powerful

I am Hachiman Hikigaya. My cheat ability is accessing the memories and experiences of Hachiman Hikigaya from other timelines. As everyone knows, I, Hachiman Hikigaya, am a workaholic in the industry, with countless identities: writer Hachiman, the son-in-law of heaven Hachiman, the son-in-law Hachiman, the magician Hachiman, the god-slayer Hachiman, the association agent Hachiman...