MTL - The Kryptonian of a Certain American Comic - Chapter 376 170, speedmaster

William knew he shouldn't have taken that boat, but ambition can kick you in the teeth.Relma Artorious knew she should not listen at doors. But she is a girl with big ambitions and no intention of being less than her potential.Abdul Sahshir knew he should not undertake that assassination on Tuor's mountain. Yet, with his life ending before it has begun, he has nothing to lose and everything to gain by glory.Three stories intertwine and shape the destiny of many more. But not all heroes are on the same side, and the shifting of dreams and destiny is a fickle one...The compiled documentation of all my published stories on Royalroad. Read if you want to go all the way through to the end.

He kept her by his side, never letting go! “Please, can you let me go?” “Impossible,” he said, “unless you're no longer my only one.” After they fell in love, he declared possessively, “I want to keep you by my side, to make you belong only to me. You can only love me too, your mind, your world, must be filled with only me.” Yet his domineering love sent a chill through her.

The protagonist, having degenerated into a “loser” after being unable to find employment, gets caught up in someone else’s attempt to commit suicide-by-train and ends up traveling to another world. The numerous cheat powers he demands from God are all granted to him. But contrary to expectations, these powers bring about disastrous consequences for the protagonist.

Having reincarnated into another world, the optimistic protagonist (Yuuri) starts his(her) heart-warming training days with his(her) teacher.