A Fine and Bright Day
One day at a funeral, after Chiharu's mother remarried, Chiharu met the child from her new stepfather's previous marriage, Rui. Rui decided to live on her own after the death of the grandfather who raised her, and Chiharu decided to live with her.
28 chapters
- Chapter 25 — A Day Off With Rui-kun and Friends
- Chapter 24 — Rui-kun and Kickball
- Chapter 23 — Rui-kun and Picnic
- Chapter 22 — A Day with Chiharu and Rui-kun
- Chapter 21 — Rui-kun and Kirika's troubles
- Chapter 20 — Rui-kun and Break
- Chapter 19 — Rui-kun and Bring Your Parent to School Day
- Chapter 18 — Rui-kun and Weirdo
- Chapter 17 — Rui-kun and Fans
- Chapter 16 — Rui-kun and a Summer Rainstorm
- Chapter 15.5 — A Day of Summer for Rui-kun: Part 2
- Chapter 15 — A Day of Summer for Rui-kun
- Chapter 14 — Rui-kun, Kurumi, and a pool in the summer
- Chapter 13.5 — Rui-kun and Souvenirs
- Chapter 13.1 — Rui-kun's Return to Her Hometown: Part 2
- Chapter 13 — Rui-kun's Return to Her Hometown Part 1
- Chapter 12 — Rui-kun and Chiharu's vacation
- Chapter 11 — Rui-kun and Dessert
- Chapter 10 — Rui-kun's Tanabata
- Chapter 9 — Rui-kun's pool has opened
- Chapter 8 — Rui-kun's summer shopping
- Chapter 7 — Rui-kun and Tama
- Chapter 6 — Rui-kun's sports festival
- Chapter 5
- Chapter 4 — Rui-kun invites Kurumi
- Chapter 3 — Rui-kun and flower
- Chapter 2 — Rui-kun Goes to School
- Chapter 1 — Rui-kun and Chiharu