My Divine Pet Daughter Calls Me Dad, but I’m Her Brother, So Don’t Call Me Mom

[Online game in another world + pets, including but not limited to cat girls, dragon girls, and tree girls + siblings with contrasting personalities]

Everyone transmigrates, and his younger sister awakens an SSS-rank talent, while he’s an F-rank loser who can only rely on her support.

Then the apocalyptic beast tide arrives. His SSS-rank sister is soaked in blood and on the brink of death, so he calmly picks up the newborn little dragon girl beside him. “Sweetie, they’re making too much noise.”

The next second, draconic might sweeps across the land and all beasts submit! His sister is stunned. What kind of monster has my brother been raising?!

His younger sister has been reborn and thinks she can protect him this time.

But she has no idea that he’s already activated the Divine Pet Breeding System. Every pet he casually hatches is a humanoid nuclear bomb!

An ordinary lizard egg? It hatches into a dragon-blooded princess who kills a high-level BOSS with one punch!

A withered ancient tree seed? It grows into a World Tree spirit.

Then one day, his dragon daughter, trapped in an illusion, clings to his sister’s leg and calls out in a babyish voice, “Mommy!”

His usually aloof sister freezes on the spot, her pretty face turning bright red!

He breaks down on the spot. “That’s my sister! Don’t call her Mom!”

From then on, his SSS-rank sister goes from guardian deity to his number-one “rival” for affection...

And I slowly regain my confidence as an older brother, with a sister who gets called “Mom,” pets who call me “Dad,” and me, the couch potato, of course. (Please, I really am just a couch potato!)