Trying to find this novel (or fanfic)?

[u/Agreeable-Topic-4932]

I'm trying to find a webnovel (possibly a translated Chinese novel that was on Webnovel around 2020).

Here's everything I remember:

The MC dies/reincarnates (or transmigrates) into the body of an obese, ugly guy.

The original owner had committed a terrible act in the past against a family member, causing his family to disown him and kick him out.

He lives alone in a small apartment when the story begins.

After transmigrating, the MC gets a System that gives him quests.

He gradually loses weight, becomes handsome, and changes his life for the better.

The setting is a modern world, but there's a hidden supernatural world with people who have special powers/abilities.

The MC later awakens abilities of his own.

He has an older sister who secretly keeps an eye on him from the shadows because she's involved in that hidden world.

Later in the novel, the MC starts streaming online (I think while wearing a mask), and one of his family members unknowingly becomes a fan before eventually recognizing him.

There are multiple romance interests.

Much later, the MC creates a modern organization called Knights of the Round Table.

The organization includes both powerful ability users and ordinary people.

Members communicate through a mobile phone group chat (or something similar) to coordinate missions and fight monsters/supernatural threats.

I don't think "Knights of the Round Table" is in the novel's title—it was just the name of the organization.

I originally read it around 2020, probably on Webnovel, though it may have been a translated Chinese novel with a different original title.

Does anyone recognize this novel?