(Love triangle chaos + yandere + reborn + suspense + mind games + multiple heroines + System; all female characters are over 18, so don't read if that's not your thing. The protagonist grows over time.)
After watching Uncle Bao's video, he ran off to Japan, where fate took a turn when he treated a Japanese girl to 13 yuan worth of oden, only to get stabbed in the kidneys 13 times...
White Impermanence: Why are you in Xia's blanket? Among Us!
Black Impermanence: No idea. Maybe Xia's blanket is warmer, Mambo.
First-love beauty: Honey, have the first goji berry milk tea of autumn.
Internet-addicted girl: Play a round of galgame with me, you jerk!
Bratty girl: It's time to shoulder the mission of ensuring our species thrives.
Catgirl: Who gets to be Big Brother's first kill, meow? Just watch me slash her face to ribbons.
Yandere childhood friend: So you only look at other girls? I'll stab you right in the waist!
Shen Kui: Don't fall for me. It won't end well. Why am I, an utterly ordinary guy, being besieged by yandere girls?