Movies:

One day, a mysterious letter 'F' starts to be written on doorplates in a condominium building. Since then, mysterious incidents consistently occur around Yukari Yamamoto, who is an ordinary female high school student living in the building....

Kumiko Hayakawa and Keiko, whose parents had died three years earlier, lived together, cuddled up to each other. One day, when they arrived at a corner of a multi-tenant building, Keiko disappeared to buy sanitary products, and Kumiko got on the elev...