KO One: My Sister Is Lei Ting, Living Life on Easy Mode

[KO One 3 + Overprotective Brother + Lei Ting + No Breaking Up the Canon Couple + Fanfiction] After an accident, he transmigrates as Lei Ting's younger brother and transfers into KO One, embarking on the path of “mooching off his sister.” He gains a hundredfold feedback System: anything he gives away for free is returned to him with a bonus.

Lei Ting: “Is my little brother taking steroids? How is his battle index so high?”

Wang Dazhong: “Hmm~ It must be Jin Kela.”

Gu Zhan: “Once I defeat Wang Dazhong, you're next, Lei~ Ze~”

Demon Lord Diabolo: “Is that thing even human? He's the real Demon Lord!”