Back For My Daughter - Chapter 29 - Did I Kill Your Ancestor?

Dimensional Rifts permeate throughout the Chaotic Universe, bringing with them immense dangers… as well as innumerable treasures.

In a small Realm, a destitute boy awakens the Idle Gaming System.

Countless Dimensional Rifts later, he lazily raises his head to realize… he is invincible!

Neptune in One Piece, Tail Beast in Naruto, Fate’s Fantasy Species, Gourmet Captive Cuisine.
This is a dimension restaurant opened in Marvel, connected to dimension world, welcome you to taste the deliciousness of world.

- Description from Uukanshu

Volume 1 (Set between volumes 13 and 14)

A series of short stories set before the events of volume fourteen including how Team GROUP was formed.

Volume 2 (Set between volumes 16 and 17)

A series of short stories including two separate meetings between Touma’s and Mikoto’s parents, two tales involving two of the Level 5s of Academy City, and other funny stories involving some of the characters.

After a vacation, when she returned to her country she caught her fiancé cheating. She angrily left and disappeared.

Five years later she returned with her talented kid. Afterwards, her son participated in the piano competition. Unexpectedly her son actually came looking for his father.

“The camera on this side, take me to take a look! My name is Xiaoxi my mommy is called Tang Siyu and she’s very pretty! I’m four and a half years old this year. I’m looking for my father, you probably look like me, please be sure to contact me, oh!”

After that, he was gone from the front of the camera again and said, “Oh, I’ll wait for you!”

In the background, a woman became mad. A few days later, a mysterious man came to their doorstep and claimed to be Little Xi’s father.

Tang Siyu looked at this tall and handsome man, who her son was a carbon copy of, and then became angry.

Five years ago, the bastard who pinned her down was him?

- Description from Novelupdates