The supporting character's harem is very normal - Chapter 39 You are also afraid of the Church, right?

Shen Dongqing is a powerful, thousand-year-old ghost. He had just possessed a body and hadn’t even relaxed for two days yet when he was pulled into a white, parallel world.

On the first day of the Infinite Nightmare Game:
Other players tremble, crying and wailing wanting to go home.
Shen Dongqing eats, sleeps, and plays ‘Fight the Landlord’ (card game).

The second day:
Other players are chased endlessly by ghosts, crying loudly ‘Save me!’
Shen Dongqing eats, sleeps, and plays ‘Fight the Landlord’.

The third day.
Shen Dongqing……
The ghosts finally set their sights on this lazy player. The other players watch on in glee. As a result, who knew that this slim and pale youth would stand up and easily dispatched the ghosts with his bare hands.

Other ghosts: Can’t afford to disrupt this elder. Let’s go, let’s go.

- Description from Novelupdates

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume

Situ Xin was highly intelligent, but because she had been an orphan since a young age, she was quite unemotional.During her last mission, she was betrayed by “one of her own.” As her soul was in the process of Soul Formation, she was saved by the Phoenix Jade Pendant she wore, allowing her to be reborn as a fetus in her mother's womb. Moreover, she carried a space with her.Let's see how she lives a different life after being reborn in 1988.A new work by Ai Guo—Rebirth: Not To Be Cannon FodderIntroduction: Mi Zhiyao, the heir of the mysterious and ancient Aristocratic family—the Mi Family, woke up from her sleep, only to inexplicably become another Mi Zhiyao from a different time and space, who committed suicide for love in the Mi Family.The same name and a similar status, but two completely different personalities.Watch as Mi Zhiyao fiercely dumps her scumbag fiancé, deals with her greedy cousin, and then leads the once-declining Mi Family back to the pinnacle of their family.

Every myth and legend is a path to Godhood!