The euphoric release of endorphins a person experiences from complaining about something and then receiving the special treatment.
This restaurant's service is terrible, I am going to have to get my Karen-heroin!
Easy peasy lemon squeezy. The easiest thing to do.
You wouldn't hurt him. You couldn't even give a rat heroin
a girl (especially fictional ones) who has been rejected by her crush
Nukumizu: "So you weren't even going out? Then it's not cheating at all!"
Yanami: "I-I mean, it was basically like we were half-dating though. And if that soggy cow hadn't waltzed onto the scene, we'd probably still be together!" (She was talking about the other girl whom her crush rejected her for)
Nukumizu: (to himself) "Wasn't she a 'dear friend' a moment ago?"
Yanami: (crying) "But I get it. If I'd worked up the courage sooner, things might not have turned out like this."
Nukumizu: "W-Well, you might be right."
Yanami: "I'm sorry I'm such a mess today."
Nukumizu: "No, it's totally fine. (to himself) That's not what you need to apologize for."
Yanami: "But I'm okay with it. As long as Sosuke's happy, I'm okay with it."
Nukumizu: (to himself) "What a spectacular reaction to getting rejected. Speaking of, there's a term that perfectly describes girls like her. Yanami Anna. Yes, it fits you perfectly. You're a 'losing heroine'."