Visit the Alleyway behind the convenience store on Day 3. Many players miss a critical clue there that was added in this version update.
Rikochan Is Missing V10: A Deep Dive into the Viral Lifestyle and Entertainment Phenomenon
The name "Rikochan" (possibly a nickname for a character like “Riko”) and the inclusion of "Eng" (likely shorthand for “English”) imply translation from a non-English source. If this is a localised manga or YA novel, the lifestyle/entertainment focus could reflect modern trends in Japanese or Korean pop culture, translated for global audiences.