I Can Turn into a Fish - Chapter 32: Xiao Ying’s Class Party

Liszt finds himself reborn as a countryside baron in an alternate world resembling medieval Europe. In this world, there are dragons that can discharge metals, elves that can tend to crops, and missions written in mist that only Liszt can see. With the help of the mysterious missions, can Liszt gradually grow from Baron of Flower Town into something greater, claiming the whole continent and beyond?

Zhang Siyi, a graduate student of architecture department went back from overseas seeking for work, he had a heated fight with his ex-girlfriend in a cafe. Angered, his ex-girlfriend was about to splash a cup of coffee in his direction but he managed to dodge it. As he stepped back, the misfortune was met by the handsome guy next table instead.

The following next day, as Zhang Siyi headed for a company interview, he discovered that the interviewer was the same man who suffered the splashing of coffee.

Hopeless, Zhang Siyi thought this work was unalterably unattainable, but that handsome man unexpectedly “disregarded past grudges” and decided to hire him. Even more, the man had become his immediate superior.

To accept Zhang Siyi by the said man, he was moved to tears with such magnanimity and kind-heartedness. Never had he realized it yet that his “miserable” fortune has just begun…

- Description from Novelupdates

A teen is summoned to another world as the Hero. It turns out the Hero can power up women with his cum.

…but it seems pretty doable.