Source: https://kakuyomu.jp/works/16817330656504689303
synopsis
Otaru Yuto’s younger sisters are the most talked-about beautiful twin sisters in town.
The twin sister, Otaru Yuri, is an honor student, and the twin sister, Otaru Kairi, is a blonde-haired gal.
One night, the beautiful sisters overhear their parents talking in the living room about the shocking fact that the twin sisters and Yuto are not related by blood.
The color of their eyes gradually changes, as they have loved their older brother Yuto since they were little ……?
Chapter 1: Is it possible that I’m the only one who doesn’t know that they’re stepsister?
Episode 1 – Anomalies of the sisters
Episode 3 – Consultation for gal’s problems
Episode 4 – Kairi’s feelings and Yuri’s true nature
Episode 5 – Stepsister meeting
Episode 7 – It’s study time you know?
Episode 8 – Imouto chan wants to be praised
Episode 9 – Yuri’s passionate (heavy) feelings
Episode 10 – Kairi’s confidence and Yuri’s seriousness
Episode 11 – Mother’s frustration
Episode 13 – Twin sister and sparkles
Episode 15 – A peek into the abyss (sister’s secret)
Episode 16 – Test day, Mother’s backlash
Chapter 2: Winter break, three weeks with brother
Volume 2 Episode 1 – Test results, no hard feelings
Volume 2 Episode 2 – monster stepsister [Kairi’s amusement, Yuri’s jealousy]
Volume 2 Episode 3 – Invitation to stepsister lake
Volume 2 Episode 4 – Sparkling Christmas Date
Volume 2 Episode 5 – I would rather see onii than illumination
Volume 2 Episode 6 – A Time Alone for Two (Kairi version)
Volume 2 Episode 7 – Alone Time for Two (Yuri version)
Volume 2 Episode 8 – We’ll be here again next year – it’s not going to happen (I assure you)
Volume 2 Episode 9 – Onii chan’s fingerprints
Volume 2 Episode 10 – New developments after the festival
Volume 2 Episode 11- Gift from Kairi
Volume 2 Episode 12- Kairi’s friend’s participation?
Volume 2 Episode 13- Kanna is a natural boyish gyaru
Volume 2 Episode 14 – He will find out
Volume 2 Episode 15 – Yuri appears, air freezes
Volume 2 Episode 16 – Kanta’s request
Volume 2 Episode 17 – Direction of twin sisters
Volume 2 Episode 18 – Kanta Danger
Volume 2 Episode 19 – Kairi and Kanna
Volume 2 Episode 20 – Happy New Year. And the stepsister war begin
Volume 2 Episode 21 – White and erotic sighs
Volume 2 Episode 22 – attack, blame, and make fun of
Volume 2 Episode 23 – Kairi, move
Volume 2 Episode 24 – suspicion
Volume 2 Episode 25 – Guilt and a Glimmer of Hope
Volume 2 Episode 26 – Kanna strikes back