Quick Transmigration: I Start by Winning Over My Friend's White Moonlight!

[Quick Transmigration, Self-Serving, Coercive Romance, Regret and Redemption, System]

Good news: Jiang Wuya is reborn.

Bad news: He’s been chosen as a research subject by the M89 Nebula.

System: If you want eternal life, you have to complete the missions.

Jiang Wuya: What missions?

System: Let’s start by winning over your brother’s fiancée.

World One: The fiancée who was betrothed to his friend as a child

World Two: His brother’s lovesick heiress

(Each volume is a standalone story with its own world and female lead, so there’s no harem. The stories include both modern and ancient settings.)