"A Fine Day in My Favorite Color ~I Forgot Our Promise from Long Ago, and That Small Child from Back Then Proposed to Me~"

Shinoyama Riina is a working adult. On her 20th birthday, she receives a marriage proposal from Hashizaki Miyu, who is like a younger sister living in the neighboring house. This is a story about a second-year working adult who became flustered and accepted a childhood confession, and a girl who has been longing for marriage with her beloved older sister. ☆Also posted on Alphapolis