Saya, who works as a translator, lives with her bisexual former girlfriend, Michiru, and Michiru's son, Yuuta. Residing in the same apartment building is an actor called Nico, who drops by for a visit almost everyday, and knows about Michiru's past. Somewhat like family, and somewhat not, their lives interweave full of warm days.

A collection of stories that revolve around letters.

Story 1, Strawberry and Anemone: Tsuzuru does want to kiss his girlfriend, Ichiko. He can’t, though, for a reason more biological than psychological...

Story 2, The White Messenger: Delivering a letter is a simple enough mission, but not when the intended recipient is a disowned royal.

Story 3, Periparus ater: When a wanted criminal saves a blind boy, neither expects the bond they will forge.

Story 4, Schrödinger’s Sweetheart: Eight women gather at an auction, united by their initial—H—and by their late paramour, E. Grosvenor.

Story 5, Stellar Ship and Ship of the Moon: A spaceship captain is meeting with her old classmates ten years after their last reunion.

Private tutor Sawa has unrequited feelings for his student Nitou Nanao. Sawa has decided to love Nanao until he leaves to study abroad, but one day Nanao tells him he’s interested in having sex with him. Not being able to refuse him, they delve into a special relationship.