Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 4 - 4-6. Carriage and Coachman

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

Follow Benjamin Joyce, an elderly man with a passion for blacksmithing who spent his life travelling the world and learning new things. Now, after helping out the developers of the first ever real VRMMO game, he gets the chance to play said game earlier than the majority of other people.

Wang Ye transmigrated to a world of summoning pet monsters and made a contract with an ordinary little green sparrow as his pet monster. To his surprise, he awakened the Pet Simulator talent that allowed him to evolve his pet monster through simulations. The pet monster would evolve based on the ultimate evolution form set by its master.

[0 years old. Little green sparrow was born. It practiced flying on a cliff. It encountered a strong current and dropped from the cliff. It was covered in wounds.]

[1 year old. Little green sparrow learned how to fly after much hard work.]

[2 years old. Little green sparrow saw a mysterious bird dancing in the air and sank into deep contemplation.]

[5 years old. Little green sparrow got better at flying. It comprehended the skill of Sky Dancing.]

[5.5 years old. Little green sparrow got bolder and attempted to learn how to swim. It plummeted into a spring from the cliff and drowned. It acquired the personality of Unstoppable Courage.]

After the simulation ended, the pet monster could acquire either the skill or the personality it mastered during its life in the simulation.

After going through a certain number of simulations, the pet monster had a chance of evolving into the predetermined ultimate evolution form.

Wang Ye took a glance at his little green sparrow that was pecking away at rice. Without hesitation, he decided on its ultimate evolution form – the divine beast Angewomon.

His little green sparrow looked at him with a look of confusion.

Yang Wei and Qi Xiao Yan had been married for a year and were unable to reach mutual understanding on many topics, except for one——divorce!

They didn’t know that there was still one more thing they also reached a strong, mutual understanding on——

Want to find your second spring?* In your dreams!

In short: Mr. Qi and Mrs. Qi end up happily remarrying each other.

*(idiom) try to fall in love again

- Description from Novelupdates