Douluo Dalu 2: The True God King - Chapter 31: [DD2]:

Usami is a beautiful classmate with good morals and top grades. At school, she views Sakuto as her rival. But when he bumps into her after school, he sees a different side of her. She was playing at an arcade after classes, and she had this innocent smile that one couldn’t imagine on her at school.For the sake of getting along with her, he gets close to her at school and then plays together with her after school. They each have their places where they can deepen their bonds, and at last…This is the start of a heart-warming love triangle romcom!

“From today onwards, you will become the Envoy of one of the Main Gods in the Dimensions of Gods. You will travel from one world to another and through that, you will attain what others will never obtain in their entire life.”

The moment these words echoed in Fang Li’s head, Fang Li’s life was destined to be extraordinary…

- Description from novelupdates

In the era of interstellar warfare, every melee mech will be paired with a long-range sniper mech to cover the battle.
The sniper mecha master Yan Xueshan (beta) and the melee mecha master Arthur (alpha) are just such a pair. The two have been together for six years.
The upcoming Armageddon is a near-death battle.
the day before.
Yan Xueshan: “Remember to write a suicide note in advance.”
Arthur said frustratedly: “I have only one regret. If I die this time, I will be a virgin until I die.”
Yan Xueshan snorted coldly: “…no promise.”
Arthur asked pitifully, “Master, can you fulfill my dying wish??”
Yan Xueshan: “?”
How absurd.
But Yan Xueshan thought about it, this is his comrade-in-arms, whose life and death intersect, chastity counts as a p- OK, I agreed! !
However, after the Armageddon, none of them died.
Not only did they become war heroes, Arthur also turned into a federal prince.
Arthur took out the marriage application, just one signature, and said honestly and faithfully: “Master, didn’t you say that you will go back to get married and retire after this battle? You help me fulfill my wish, and I will help you fulfill my wish too!”
Yan Xueshan: … something seems to be wrong?

Content tags:
Search keywords: Protagonist: Yan Xueshan, Arthur ┃ Supporting role: ┃ Others:

- Description from novelbuddy

She is the newly crowned Best Actress of the Entertainment Circle as well as the long-lost second young lady of the Ye Family in the Imperial City, a fact everyone knew. The eldest daughter of the Ye Family was the Chairman of the Fenghai Group; the third son of the Ye family, a big shot in Imperial City; but the found second young lady was merely a decoration in the Entertainment Circle.Her father did not love her, her mother did not cherish her. However, nobody knew, behind the guise of a mere decoration, she was in fact an exceptional agent that international powers found troubling!Unexpectedly, she made a mistake, was tricked, and accidentally bound herself with a system to complete tasks and absorb energy.Since then, she dominated in all parallel universes, rewriting the tragic lives of others. In whichever world she was in, she thrived effortlessly. What she did not anticipate, however, was crossing paths with a big shot from a mysterious power…When she finally recovers her strength to return to her peak form, she could let go of her identity as the second young lady of the Ye Family; she could reject her family's estate. But, if she didn't give a good reckoning to those who plotted against her, how would she do justice to her hard-earned title of Chief Agent?Once her identity is fully revealed, it would be her time to shine!***One a prodigious mystery youth, the other a world-renowned Chief Agent, this is a showdown between two formidable figures.***The alternate titles of this novel include “The Heroine Is Really Amazing” and “The Hero Is Really Handsome”.—【Refreshing】【Quick Transmigration】【1v1】