MTL - Weird Wizarding World - Chapter 15 explain

Ling Xiao was secretly in love with a girl named Mo Qi; because of an accident, they both crossed into the ancient times.

Mo Qi who was preinstalled with the Mary Sue halo, in these ancient times, walked to the summit with a golden finger.

However, Ling Xiao continued to be exploited by Mo Qi.

After he no longer had any values to exploit, he soon became a pitiful cannon fodder.

The heavens decided to take pity on Ling Xiao.

And gave Ling Xiao an opportunity for rebirth.

After rebirth, he vowed that all his enemies would repay him with a debt of blood!

However, why have all these enemies of his, fallen into the mode of cutting their heads open?

“Hey, are you really that unremarkable person who used to follow behind Mo Qi?”

“So this dance was originally danced by you, sigh……”

“You are obviously a man, yet you move me so much.”

“Enough! Since you have taken the initiative to provoke me, then you must concentrate on me!”

Ling Xiao expressed: If you want to counterattack, then counterattack. As long as your golden finger is bigger than Mo Qi’s.

But how did Mo Qi’s Mary Sue halo end up in his body! He is still a straight man who likes beauties! He definitely, definitely doesn’t want to turn bent!

- Description from Novelupdates

Though he received the skills necessary to teleport across worlds, the king who performed the summoning ritual attempted to trick him into wearing a slavery collar, this annoyed him so he kidnapped the princess and returned to Earth.

On his usual way to home Mikado Tsuchio fell into a hole that suddenly opened on the ground. Just like that, Tsuchio falls in a different world, he lands on a Grappler Wyvern and manages to tame it.

Tsuchio decides just like that to live in the other world, the reason for his quick decision: he wants to make a monster girl harem.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.