Masato Ooizumi just entered high school and he finds himself staying with a relative. Living there is his “cousin big sister” who's being way too close with him!? ___ **Additional Links:** - [Official X](https://x.com/itoko_ane0517)

Genres:

RomanceComedy

Released: 2024

Status: Ongoing

Total chapters: 31

Chapter

26 Volume 4 Chapter 26

Ako-nee's Request ♥︎

25.3 Volume 3 Chapter 25.3

Illustration Gallery + Extra Pages

25.2 Volume 3 Chapter 25.2

Saya-neechan's taking a nap ♥︎

25.1 Volume 3 Chapter 25.1

Aunt Shiho is defensless too ♥︎

25 Volume 3 Chapter 25

Lately, Ako-nee has been acting a little ••• ♥︎

24 Volume 3 Chapter 24

Taking Care of my Onee-chan ♥︎ (Part 2)

23 Volume 3 Chapter 23

Taking Care of my Onee-chan ♥︎ (Part 1)

22 Volume 3 Chapter 22

On my Way Home with the Class President ♥︎

21 Volume 3 Chapter 21

Doing Hypnosis on my Onee-chan ♥︎

20 Volume 3 Chapter 20

The Dual Nature of Ako-nee ♥︎

19 Volume 3 Chapter 19

A Date with my Onee-chan and A Parfait ♥︎

18 Volume 3 Chapter 18

I'll Clean your Ears ♥︎

17.2 Volume 2 Chapter 17.2

3 Special Illustrations + Extra Pages

17.1 Volume 2 Chapter 17.1

See-through ••• ♥︎

17 Volume 2 Chapter 17

Peeking at Onee-chan ♥︎

16 Volume 2 Chapter 16

Class President in Trouble ♥︎

15 Volume 2 Chapter 15

Playing a board game with Onee-chan♥

13 Volume 2 Chapter 13

I got drunk ♡

12 Volume 2 Chapter 12

You really looked cool♥

11 Volume 2 Chapter 11

Let’s go Swimming♥

10 Volume 2 Chapter 10

Health class with Onee-chan♥

9.5 Volume 1 Chapter 9.5

Skimpy Swimsuit ❤︎

9 Volume 1 Chapter 9

Let's Cool off Together 🖤

8 Volume 1 Chapter 8

A Watch Party With the 3 of Us 🖤

7 Volume 1 Chapter 7

My Other Big Sister Cousin 🖤

6 Volume 1 Chapter 6

A Reward for You ❤

5 Volume 1 Chapter 5

Sending Love and Support ❤️

4 Volume 1 Chapter 4

Let Me Play With You ❤︎

3 Volume 1 Chapter 3

3

2 Volume 1 Chapter 2

2

1 Volume 1 Chapter 1

I will teach you♥