Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 138 - 137: The Wind Flutters the Banner

Yiwen traveled through time, but Yiwen didn’t panic at all…

Because he traveled with him, as well as the character template in the mobile game, and the five devil fruits obtained by the lottery.

Yiwen believes that she can rely on the special physique obtained by charging six yuan for the first time, and the devil fruit in the backpack, and become a strong party in the world of One Piece.

Until Yiwen opened her eyes and saw a crimson dragon.

Only then did Yiwen realize that this was not One Piece at all, but Fairy Tail!

Start to capture Erza? The start was captured by Irene!

- Description from novelbuddy

There are three realms in the multi verse; The Cosmic, the Mortal and the Nether realm.

Hal grew up in the mortal realm with no idea whatsoever of who his parents were.

His love for relics, adventure and the occasional danger would aid him in finding a genie's lamp.

Rubbing a genie's lamp should grant three wishes, but Hal is struck by lightening instead and eventually arrives in the Cosmic realm with a large book in his mind space titled; The Primordial Cosmic Grimiore, that apparently holds all knowledge for a perpetual reign.

And so Hal's journey begins in a little city called Salmon city, in the body of a 17 year old boy also named Hal but was sold into slavery by his own father.

Hal finds out who his mother (prior to reincarnation) whose bloodline now flows unmixed in his new body is....

Join Hal as he battles mortals, Dragons, phoenixes, Gods and many more together with his harem of Beauties for the complete subjugation of the three realms.

The interstellar boss, Zi Yi, has come back to life.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates