MTL - Genius Demon Empress - Chapter 888 Heartless

Growing up in a place where the rule of the jungle is law, the simple yet cunning Shaar is thrown into the chaotic world of war and political turbulence. After a chance meeting with a mysterious young girl, his destiny is forever changed as he embarks on a journey, joining the Byzantine army and climbing its ranks. With his bizarre beauty standards, will he ever return the affection of the girls that will follow him? Will he ever learn about his real parents? What lies ahead of him is a journey of strange humor and adventure.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

An incredibly athletic older brother, Tenryu Taiga. A programming genius girl, Tenryu Fuyuki. The two siblings separated for eight years ended up living under one roof again after facing the problem – a lack of funds for living expenses.

Fuyuki proposes a way to earn money, a core system deeply involved in people’s daily lives, a game that awards you money as a prize for defeating malicious bugs in cyber world, the 《Aries》structure. Taiga after becoming a warrior in the game relying on his inborn senses, is puzzled by the unfamiliar sensation.

One day Saionji Rui, Fuyuki’s best friend appears and is attacked by a mysterious bug― “I’ll be waiting, my prince.”. Hybrid fantasy battle of cheating siblings begins here!

I have a childhood friend.