Contract Sisters by Hijiki — Ongoing
- Volume 1
- Chapter 1: Sisters joined by a contract released Apr 17 '22
- Chapter 2: Sisters who eat together released May 1 '22
- Chapter 3: Sisters who live together released Jun 16 '22
- Chapter 4: Sisters who spend their days off together released Jul 23 '22
- Chapter 5: Sisters who have a pure and proper relationship released Aug 19 '22
- Volume 1 extras released Sep 5 '22
- Volume 2
- Chapter 6: An older sister who goes to see her younger sister released Sep 5 '22
- Chapter 7: Sisters who sleep together released Oct 18 '22
- Chapter 8: Sisters who hang out with each other released Nov 8 '22
- Chapter 9.1: Sisters who make plans together released Jan 5 '23
- Chapter 9.2: Sisters who make plans together released Mar 17 '23
- Chapter 10: An older sister who goes to her younger sister's cultural festival released Apr 19 '23
- Chapter 11: An older sister who puts her little sister first released Jun 21 '23
- Volume 2 extras released Oct 12 '23
- Volume 3
- Chapter 12 released Oct 12 '23
- Chapter 13: Sisters who have different relationships with the people around them released Jan 23 '24
- Chapter 14.1: An older sister who hurries home for her younger sister's sake released Feb 23 '24
- Chapter 14.2: An older sister who hurries home for her younger sister's sake released Mar 26 '24
- Chapter 15: Sisters who celebrate a birthday together released Apr 13 '24