Since childhood, you and your rival have clashed, competed, and constantly annoyed each other. Now, in college, a strange psychological "System" activates in your mind with one purpose: to curse your rival for life.
While you were planning to impose an incredibly cruel and petty dietary restriction, you choke on your own saliva and start coughing. The System registers it.
Now, your rival must consume your saliva every day... or they will die.
How will you save their life... or torture them with the truth?