Pokémon: Start with a Dragon-type Gym Leader, and pick up Guroton.

The rating is low because it's a new book and has just started receiving ratings; it will rise, so don't worry.
[Pokémon + Pokémon + Pokémon + Thrilling story + System + Exciting battles + Slow-burn + Relaxed slice-of-life + Gym Leader + Livestream + Pokémon + Multiple female leads]
"As the dojo master, Mr. Li Luochen, you used the power of a dragon to dominate the entire arena, shattering the mental fortitude of the regional champions. What are your thoughts on this?"
The reporter interviewed Li Luochen, the youngest Pokémon Master in history.
"Slander, pure slander! I'm letting them face the legend head-on, giving them the qualifications to advance further," Li Luochen smiled.
"It is said that you publicly demanded control from various evil organizations, and the leaders of these organizations expressed great dissatisfaction and wanted to unite against you. What is your opinion on this?"
"Ugh, as a true hero, is it wrong for me to reclaim my organization?"
Li Luochen glanced at Rashiram beside him, still smiling.
"It's rumored online that you said Yulongdu, the pure flying king, is just for fun, while the true dragon champion is the one who truly deserves the title. Is this true?"
Li Luochen stood tall and proud: "I don't believe rumors, and I don't spread rumors."
After saying that, he turned and left.
Charizard, Dragonite, Gulliverton, Milton, Reshiram, Zekrom, Kyurem, Zygarde, and many other Pokémon followed suit.
This story is also known as: "Miss Cattleya Wants Me to Confess," "Dragons are the weakest in the early stages? Did you ask my Guleton?", "I'm a true hero, it's not too much for me to like killing others, is it?", "Dragons are weak to fairies? Go tell my Wuji Tai!", and "Riding the Dragon is purely for fun, the true dragon champion still belongs to me, Li Luochen."