The Dark Warrior (OC Ultraman x Overlord anime)

Makoto Kuroi, a 18 years old teenage boy who is a guild friends of Momonga (Ainz Ooal Gown).

Both Makoto and Momonga had a favorite tokusatsu hero series called "Ultraman R/B" which they love it so much. Makoto Kuroi avatar's name is Orb Dark (Orb Dark Noir Black Shwartz), Makoto uses that name, well its because he like the new evil ultraman character in Ultraman R/B series and also he recently got home after he purchase DX Orb Ring NEO along with DX R/B Gyro along with the R/B Crystal Set and when he was about to enter his house, his phone began to ring and showing the message of his friend Momonga telling Makoto that the Yggdrasil is going to closed which Makoto began to log in to the game quickly.

After Makoto log in, he began to chat with Momonga and HeroHero about their guildmates must leave the games, which makes Momonga sad but Makoto comfort him as Makoto and Momonga waiting for the time reaches zero..........but the time of the game continue after reach zero.

Both of them began to panic, and both of them shocked that the NPCs that created by them along with their guildmates began to talk and feel emotions as if they are not NPCs anymore.

Now its up to Makoto and Momonga to solve these weird "glitches" and they also must to fight against the corrupted citizens and nobles, but suddenly when Makoto and Momonga are chatting about the "glitches" a bright light began to appear at the room they are inside of it and blinding their eyes as they began to saw something that shocked their hearts and eyes......that the toys that bought by Makoto appeared in Yggdrasil game.