God of Internet - Chapter 19: Arcantor Magic School App on the Internet!

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

I...AM...MOB CHARACTER!!!Sigh~My name is Samael, I was an office sla- I mean a worker who worked 9 to 5. It was a daily routine of monotony until one fateful day when I went home only to find my best friend with my girlfriend. Betrayal was the first thing I felt, followed by rage.And after taking ‘care’ of them, My surroundings changed…Looking at my reflection in a mirror, I noticed my appearance had changed. Gone was the face of the disgruntled office worker; instead, “SAMAEL ASHWOOD!!!” a character from a novel I used to read. But this wasn't just any character; I had become him—the sacrificial best friend of the protagonist who was betrayed and died in just the first two chapters.PROTAGONIST DIED!?[Heavenly Destiny System Initializing...][...]

Holographic viewing technology allowed audience members to enter a movie and personally experience it for themselves. Naturally, romance movies were the most popular and well-received, while nobody was interested in horror movies.

Su Min was the first of the viewers to experience a horror movie.

Later–

Malicious Spirit: I dare not scare or frighten my sweetheart…

Su Min: Actually, horror movies aren’t scary at all.

Audience: No, no, no, you are playing in a love movie! (Loudly)

The audience suddenly discovered that the recent rerelease of the horror movie was much better than the original. Furthermore, to everyone’s surprise, the ghost was very sweet…

- Description from Novelupdates