Her Secret summary:

Moe and Natsumi have been best friends since high school. This year, during the spring, the two of them start living together! However, ever since Moe has gotten a boyfriend, Natsumi has been conducting herself in a strange manner. Suddenly, her friend's mails fill up Moe’s cell phone screen, and she’s pushing Moe’s boyfriend away. Why is she doing these things…?Length:Story 1 - Ano Ko no Himitsu (Her Secret)Story 2 - Haru ga Kuru (Spring Is Coming)Story 3 - Goma no Kimochi. (Goma's Feelings.)Story 4 - Nee, Mai Da-rin (Hey, My Darling)