The success of Rumiru-chan lies in its use of popular internet archetypes:

The game follows the "instant corruption" (Sokuochi) trope, where a character who starts out prideful is quickly brought down to earth through various encounters.

She initially displays the "mesugaki" (smug brat) persona, acting superior and cheeky toward others.

is a Japanese visual novel released on June 19, 2021 . The title roughly translates to "Instant-Fall Succubus Rumiru-chan: I’m Sorry for Being a Smug, Masochistic Brat with a Weak Mind" (or similar phrasing), which perfectly encapsulates the "mesugaki" and "kusozako" tropes common in specific subgenres of Japanese indie games. The Character: Rumiru

It features a "loli" protagonist aesthetic, focusing on a character who appears young despite her supernatural status.