I've just read the first few chapters, the system mentioned that if the Mc completed the tasks, it will grant his wish. What was his wish??
You might want to try tagging this thread with danmei, boys love or BL, as most of the danmei lovers filter the threads using tags.
If you want spoiler as a whole, try this thread: https://forum.novelupdates.com/threads/have-to-marry-seven-men-how-to-bail.46834/ You can also try asking there for specific questions since that thread already has established watchers. Someone might know the answer.