Immortal Soul Multiverse Journey

After being betrayed and turned into a pill, the immortal cultivator lives in a world of grey. His depression swallows him completely until he spies a bubblegum-haired vampire, and life regains its color. There is only one problem: this is after Tsukune Aono's happily ever after.

The gist of it will be an immortal cultivator fighting multiple after the ending protags fighting and stealing girls. Fun for everyone am I right. Some times he will enter a world early in the timeline sometimes at the end. When he dies he'll be reborn into another anime.