Water.

Mangaupdates:

• Colour
  Story about two girls who question if it's right to be together.

• Heartless Bitch
  Two girls are talking about one of them playing with a younger man.

• Ikazu Onna (Cool Lady)
  A man sets out to search the identity of a kinky dream woman from a drawing he drew of her.

• Kisses
  Story about a young woman who leaves her boyfriend and moves to her best friend apartment not knowing that her friend loves her.

• Painful Love
  A girl, who has just broken up with her boyfriend, is thinking about him.

Painful Love and Heartless Bitch are featured in Secret Comic Japan.