Isekai Kaeri no Ossan wa, Fusei Sukiru de Fathercon Musume-tachi o Tororori ni - Chapter 18: The Stranger

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

“Why didn’t you tell me?”“Tell you what, Richard? What would you have done?”“I don’t know. Apologized sooner? Bought you a burger to make up for it?”Her eyes lit up with fire, “You think what you did to me… you think a burger can make up for it?” her eyes twinkled like she was fighting tears. Did I hurt her that badly? I was just a foolish teenager.“Nita, I am sorry. I was young, I was stupid. I wish I could take it all back and tell you how I feel instead of being a constant jerk to gain your attention.”“How did you feel that would justify what you did to me?”I paused for a minute, finding the words. “I had a huge crush on you at the time. And I didn’t know how to express myself. I was full of myself, I was the school’s ladies' man and the one girl I had eyes for didn’t even care if I existed,” “And that justified what you did to me? Richard, you broke me. I can forgive you for ‘accidentally’ spilling your ice cream on me, or throwing my due assignment in the toilet, or the gum in my hair, or the glue in my chair but tell me how can I forgive you for what you did that night? Tell me!”“What night? Nita, what are you talking about?”“Remember when you asked me if I knew who sexually assaulted me?”I nodded, but what does that have to do with anything? The more we spoke, the more confused I became.“You did and I cannot believe that you would stand there and pretend like it didn’t happen!”Nita has spent years trying to forget the torment she endured at the hands of Richard. When her family’s financial ruin forces her into an arranged marriage, she is horrified to find out the groom himself was her bully.Richard, a charming and successful businessman meets the first woman to be repulsed by him. Intrigued, he proposes a deal of a one year marriage of convenience.Navigating life as a couple, old wounds reopen, buried memories surface. As Richard learns more about his wife, he finds that he has enemies that followed him from his past to continuously cloud his wife’s judgement.Will Nita believe the truth and bury old wounds or will the pain of the past prove too strong to heal?

You Liangxing would never open the speech function in game.
That was because his voice was…
Particularly! Kittenish!

But there was one day, he queued up with a teammate who had so much to say that they may as well explode. Vexed to the point of no return, he contributed a voice that was capable of splitting heaven and earth, “Don’t BB.”
The other party who was being scolded stilled. In the ensuing silence, he suddenly let out a long, relishing… Moan.
You Liangxing: “…..”

Later —
He realised that the person was a great god,
Much later,
Without him realising,
He became the great god’s royal healer.
…. And also his boyfriend.

- Description from Novelupdates

He possessed the Xuan Gate Medical Arts and had fortuitously obtained a heaven-defying Spiritual Treasure!