The supporting character's harem is very normal - Chapter 274 Kid, you surprised me.

Suddenly a high school student Subaru Natsuki has been summoned to another world on the way back from the convenience store. With the biggest crisis of his life being summoned to another world and no sign of the one who summoned him things become worse when he is attacked.

After spending his sixth year at Hogwarts a century ago, Harry finds himself back in the cupboard under the stairs in 1991, once again receiving his Hogwarts acceptance letter.“You’re telling me my parents were killed by a dark wizard?” Harry asked. “Who is this dark wizard? Why are you all so afraid of him that you won’t even say his name?”“It’s Vol—,” Hagrid began cautiously. “Well, we call him Voldemort, because he personally killed hundreds of people.”Harry nodded nonchalantly.“And what happened the next day?”Hagrid: “Uh?”--

My name is Zhang Yanhang. I am an ordinary awakened person and a part-time college student. I live a monotonous life at three o’clock and one line every day. I go to school, practice, and go home. I neither smoke nor drink. My only hobby is to pause in time. Observe humans at the time.

I thought this boring life would last forever, but when I was lying in bed and preparing to go to bed that night, I accidentally ran into some interesting things.

[Whether to enter the world of ashes? 】

[Option 1: Yes (Successfully enter the world of ashes and gain the ability to digitize the body and the channels to become stronger. The price is that you may be late for school tomorrow because of staying up late.)]

[Option 2: No (Refusing to enter the world of ashes but feeling a bit wasteful to sleep right away, so I started playing games all night and practicing by the way, at the cost of being late for school tomorrow because of staying up late.)]

[Option 3: Ignore for the time being (It is recommended for patients with difficult diseases to choose this option. After that, you who have been suffering from sleepless nights and entangled whether to enter the ashes world will go to sleep at two in the morning. The price is that you may be late for school tomorrow because of staying up late. )】

ps: The protagonist is not the Virgin, kills decisively, the brain circuit is different from ordinary people, don’t like it if you don’t like it.

- Description from novelbuddy

A serious accident caused the protagonist’s brain to have an unusual mutation. This changed the brain development that it opened the door to a mysterious universe. Not only he obtained a ‘god-like’ powerful telekinetic control and mental perception, he also had an abnormal analysis and memory capability comparable to super computer. Having such super brain, his rough life began.

Brain development progress 10%…….20%……50%….80%…. …100%

- Description from Novelupdates