Transmigrating as One Side Character After Another, I Keep Setting Traps for My Enemies!

[Quick transmigration, male lead, no CP + System sign-in + pocket dimension + face-slapping and punishing scum + cannon-fodder villains and trash + surprisingly wholesome!?]

One second, Ye Qingyan was getting ready to welcome the new homeland rebuilt after the apocalypse. The next, he had transmigrated!

The sign-in System he got was a bit of a rip-off. It promised him this and that, then cursed this and that, and often stabbed him in the back.

The worlds it chose for him were also different from those other transmigrators visited: a blended world of period novels. And that wasn't all. The plot was as dark as it could get.

Can you imagine someone pursuing the heroine while also becoming another heroine's unwitting husband? And in between, he even moonlights as the transmigrated male lead's younger brother.

Just as Ye Qingyan accepted reality and decided to knuckle down, he ran into a transmigrator from the same company. Then his System glitched and sent him to ancient times to become the father of a heroine in an angst novel!

Ye Qingyan: Excuse me?

The plot isn't even over yet! The whole story hasn't even been explained!

After making it through the period setting and ancient times, he finally reached the modern era, where he was supposed to be a singer. With a voice so awful it seemed to repel music itself, how could he possibly be a singer?

You've got to be kidding!

Is no one going to speak up for the original owner of this body?

Volumes 1 and 2: Period-setting mash-up ✔

Volume 3: The angst heroine's dad ✔

Volume 4: The singer whose voice was ruined ✔

Volume 5: Cannon fodder in an extreme world ✔

Content warnings are in the author's note for Chapter 1. I've laid out the unpleasant bits in my comments and in Chapter 1, so please read carefully!