Magika no Kenshi to Shoukan Maou - 2.5.2 — The Qualification of the Living

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

[You have just awakened your first dragon: SSS-Rank Fire Dragon.]Drahon was born with dragon-like horns, and because of that, his parents abandoned him at an orphanage. Mocked, bullied, and branded a freak, he never knew where he truly belonged.Until one day, while serving punishment, he stumbled upon a mysterious egg...A dragon egg that opened a portal and led him into The Dragon Game.[You have summoned an SSS-Rank Demon wrymling.][You have evolved your SSS-Rank Primordial Frost Dragon into a Multi Fire-Frost Dragon.][Upgrading Fire-Frost Dragon Roar ×10...]Bond with dragons and summon them in battle? Of course. All Ranked 'SSS'Draconic skills? Master them.Monster bosses? Shatter them.Half-dragon, half-monster abominations? Burn them.Mandatory roleplaying? Absolutely. Rule kingdoms, command medieval armies, and go to war.Enemies? They’re just EXP.And just after Level One, he uncovers the shocking truth behind the game’s existence...And discovers the reason for his horns: he’s half dragon, and that grants him the ability to transform into a half dragon, half human form.[You have just slain a cerberus-class half-dragon monster.][Absorbing essence...]And now?He’ll be more than the horned freak they abandoned —He’ll become Dragon Lord.[A/N: It gets much better after level one]

The NPC sets out on a journey to defeat the Demon Lord, joined by beautiful girls he meets along the way.---This is an NSFW story, so if you're under 18, turn back now, son. No NTR, and no full-on Yuri. There might be slight Yuri—like girls kissing and stuff during threesomes—but it's not that kind of Yuri where the girls fall in love with each other while in a relationship with the MC.---

The Immortal Dao is ethereal, and Immortals are hard to find.

Li Nianfan had descended into the cultivation world as a mortal. After learning that he has no hope in cultivation, he only wants to live a peaceful life.

However…

The dog he adopts becomes a demon king of a generation when it sees his poems and paintings. It manages to suppress an entire world.

The tree he plants behind his house becomes a World Tree after listening to his zither music, forming a bridge between heaven and earth.

He meets a passerby who is enlightened by him and becomes an immortal sage who leads an entire generation.

When he looks back—

It turns out that the scholar who had been pestering him for his calligraphy and paintings despite having crappy chess skills, is a chess saint from the Immortal Realm. The beautiful woman who comes to listen to his music every night is the number one saintess of the Immortal Realm…