I Sell Gacha Jars at MiHoYo

[Genshin Impact + Honkai: Star Rail + a few Honkai Impact 3rd characters]

Because of the System's carelessness, Su Changge accidentally fell into a perilous cultivation world while trying to transmigrate. After he worked hard to reach the Deification Realm without eating beef, the Jar System finally found him, choked with emotion, and brought him back to Teyvat. From then on, Su Changge began a leisurely life selling jars in the MiHoYo universe.

(The focus is mainly on selling jars and making up for regrets. The plot comes up now and then.)

A Sam transformation device comes out of a jar. Yingmei takes off her helmet in the jar shop, leaving the Galaxy Bat Hero beside her stunned.

Blade opens a jar and finds Robin's clothes, then transforms on the spot into an immortal phoenix.

Sushang opens a jar and finds the Taixu Swordplay. She gives a Voidranger a taste of the pillow's true power with one sword strike.

Ningguang gets the ceremonial robe 'Fengyi' and immediately starts planning to seduce Su Changge. (Though she doesn't need to try.)

Keqing gets the Three Thousand Thunder Movement technique and becomes impossible to track, appearing and disappearing without a trace.

Raiden Ei: Huh? Wait, what is this Extreme Path Emperor's Helmet?!

Yae Miko: White stockings from a young woman of the Phoenix clan? Little one, I don't wear stockings~

Furina: A way to clear negative status effects? That's great~

And many more delightful antics await in this book.

P.S. The protagonist isn't exactly a good person. He's lecherous and has very obvious tastes.