MTL - It’s Actually Not Easy Wanting to be a Supporting Male Lead - Chapter 132

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

Lyle Walt is a young noble boy and heir looking forward to the day he can inherit his family’s territory. Except around when he was 10 year old, his parents started neglecting him more and more in favour of his little sister, Celes.
On his fifteenth birthday, he is challenged to a duel by his sister to see who will inherit the household and horribly loses, being cast out of his family. Afterwards, he gets treated by the family groundskeepers and receives the family heirloom Gem from him that Lyle’s grandfather had entrusted to him. From there, he begins an aimless journey with his childhood friend and former fiancée, Novem, and the Gem-turned-Jewel that houses the memories, personalities, and Skills of seven of his ancestors.

"When will people understand.... I'm only half insane?"

This is the story of an orphan, Lu Shu. He is not any regular orphan, but a metahuman experiencing the changes in himself, his country and the world during the dawn of the magical era. Watch as Lu Shu embarks on a journey to hone his peculiar abilities together with his sister, the adorable and charismatic Lu Xiaoyu. Along the way, they’ll encounter supernatural events, obstacles and even the most powerful people in their country. How will Lu Shu make the best of his abilities and oust his never-ending list of rivals and opponents?