Big Girl and Small Girl (Web ver.) by Sasuke Original Doujin

Pre-serialization version of Be Careful, Onee-san

Chapter 1: Big Girl and Small Girl released Aug 3 '20

Chapter 2: Big Girl and Small Onee-san released Aug 3 '20

Chapter 3: Big Girl, Small Girl, and Milk released Dec 18 '20

Chapter 4: Big Girl, Small Girl, and Dieting released Dec 18 '20

Chapter 5: Big Girl, Small Girl, and Studying released Dec 18 '20

Chapter 6: Big Girl, Small Girl, and a Counterattack released Dec 18 '20

Chapter 7: Big Girl, Small Girl, and Something Forgotten released Dec 18 '20

Chapter 8: Big Girl, Small Girl, and Injuries released Feb 2 '21

Chapter 9: Big Girl, Small Girl, and Horoscopes released Feb 4 '21

Chapter 10: Big Girl, Small Girl, and Hiccups released Feb 6 '21 Kabedon

Chapter 11: Big Girl, Small Girl, and the First Shrine Visit released Feb 7 '21

Chapter 12: Big Girl, Small Girl, and Tricks released Feb 8 '21

Chapter 13: Big Girl, Small Girl, and Eyes released Mar 23 '21

Chapter 14: Big Girl, Small Girl, and Lack of Exercise released Apr 5 '21

Chapter 15: Big Girl, Small Girl, and Calling released May 19 '21