MTL - Group Pet Little Fat Baby: I Have Four Big Daddies - Chapter 18 psychological butterfly effect

A Federation Colonel with abnormal thoughts was locked in a dark room and met a little looney.

“Your whole body emits a scent that I dread (covet) and fear (desire).”

A frigid Colonel X little looney roommate: A sweet story of interstellar travel

- Description from Novelupdates

“Here's what happened. I was in a desperate situation when I accidentally encountered a dragon. It told me I was a martial arts prodigy and said it would teach me the Dao of Immortality…” “This excuse for skipping class and cultivating in secret… is that seriously the reason?” “I don’t care whether it’s human or not, what matters is that the dragon said: ‘If you want to become strong, kneel and call me Master.’”

“Classes” are given at the age of 10, and the presence or absence of “skills” greatly affect life. Arel, the son of “Sword Princess” Fara and “Magic King” Leon, has been branded as “Classless”… But even without a job or skills, Arel believes he can persevere through effort.

Michael, formerly a military veteran turned mercenary, was living quite a peaceful and slightly eventful life. That was until an accident happened that caused him great misfortune, rendering him unable to continue being a mercenary. After that point, his life spiraled into that of an alcoholic, eventually leading to his demise. Before he died, he saw something odd; it was a blue hologram with the words ’Do you wish to start anew?’ Michael readily accepted and was thrust into a fantasy world with a mysterious system companion that seemed to be hell bent on making him the best healer in the world. However, as he began unraveling mysteries, he found out his identity was not as simple as it seemed.