After Swindling Hearts and Money, I Got Trapped in a Love Triangle

Short blurb: A little con artist scams people out of love and money in different worlds, then gets caught when things go wrong.

Full blurb:

Kishima Soraya is a con artist through and through. With his gift for telling people exactly what they want to hear, he has swindled plenty of people out of their money and affection. Then one day, karma caught up with him, and one of his admirers stabbed him to death.

Luckily, he has a pretty face, a silver tongue, and acting skills. A System called "Impression Value" takes him in. The more people remember him vividly and keep him in their hearts for the rest of their lives, the more money he earns and the longer the life he can buy.

Kishima Soraya agrees without a second thought to return to the line of work he's best at.

At the magic academy, he kisses the twins, turns potions class into a daily disaster, and provokes the half-blood prince. He bullies the innocent Ron whenever he feels like it, then flirts his way into the heart of the Chosen One, who is related to him by blood. His ambitions are as big as ever, and he boldly schemes against both the younger and older snakes, as well as a snake king with no nose.

In Namimori, he repeatedly saves the little bunny from bullies, gets into fights with the disciplinary committee every day, then irresponsibly slips away halfway through. One moment he's kissing an explosive, cool guy; the next, he's at that guy's archenemy's place, taking a nap. He doesn't even spare the world's greatest hitman.

In the world of Detective Conan, he uses his acting skills and golden finger to rise to second-in-command at the Black Organization, only to betray the organization in the blink of an eye and play both sides. Whether it's Gin or the FBI, no one knows what move he'll make next. Everyone is wary of him, and before every step of their plans, they have to wonder whether Kishima Soraya is going to have another whim and turn everything upside down.

In the world of Jujutsu Kaisen, he teaches the Six-Eyed King before he comes of age, captures plenty of curses and releases plenty of them too. When the white-haired boy realizes what he desires, Soraya vanishes without a trace.

Just when he's made a fortune, the System stabs him in the back: the worlds merge.

All the people he'd provoked are hiding and lying in wait, and plenty of them have grown familiar with this little con artist's tricks. One slip is all it takes for Kishima Soraya to get caught. Facing the chaos of this deadly love polygon, all he can do is give an awkward smile, break out in a cold sweat, and tell the victims glaring at him from every side, "I can explain."

But who would listen to a serial heartbreaker with a long history of setting hearts ablaze?

Warnings: *Probably no couple, open ending, with everyone harboring unrequited feelings for the protagonist.

*The protagonist is not a good person, and his values may be a little skewed. Please don't read if that bothers you.

*The logic is dead. If you're the type to nitpick the logic of certain worlds, I'll say you're right.

*The golden finger is ridiculously overpowered, powerful enough to change the plots of certain worlds [key point], especially the Harry Potter world. Because the author wants to make up for the regret of certain characters dying, the plot will definitely be changed.

If that upsets you as a canon purist, please leave immediately. [Warning]

Theme: Be honest and keep your word