[Honkai: Star Rail] + [Ultraman Tiga]
"Long-form story + main plot adaptation"
After a certain event, Lu You lost the ability to transform into Glitter Tiga. During the battle against the final boss, Dark Lucifer, Lu You was driven to the brink of despair. He planned to abandon his identity as a "human" and merge his free will with the God of Light, Tiga, completely. But at that crucial moment, his sister, who had been dead for a hundred thousand years, unleashed her final power and sent Lu You into one of countless "secondary universes": the Honkai: Star Rail universe.
Because time flows differently there, Lu You needs to regain the ability to summon Glitter Tiga within the limited time he has.
After witnessing the survival or destruction of the Honkai: Star Rail universe with his own eyes, can Lu You achieve redemption?
(I won't try to pander to any readers, and I won't post any random nonsense anywhere in the story.)
Is it a multi-female lead or a single female lead?
Such a riddle!
The synopsis says it's about making up for regrets, but the protagonist himself is already carrying regrets, right?