I Became the Youngest Summoner in the Strongest Guild - Chapter 35

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Chu Huai was parasitized by a ghost, he became weak and frail, soon afterward he died.

After entering the horror world, Chu Huai was harmoniously transformed into a man in women’s clothes.

On the first day of the instance. Everyone stares blankly at Young Lady Huai, who was holding the quilt calmly climbed onto the man’s bed: “I’m a little afraid of the dark and ghosts, can I sleep with you?”

Jin Tianyi: “…” I’ll pretend not to know that you are a man.

- Description from Novelupdates

The spiritual energy recovers, others practice, and Xu Bai upgrades.

After getting the game system, because I haven’t received the main mission, I frantically spent 22 years of experience points.

Then……

Xu Bai suddenly discovered that he was already invincible.

Practice exercises.

Full skill.

Everyone: “Why don’t you have a bottleneck.”

Xu Bai spread his hands: “What’s the bottleneck, click to upgrade, isn’t it enough?”

- Description from novelbuddy