I finally got close to the class idol, but her sister is blocking every move I make!
About
My Crush's Sister is a Total Siscon!
🌸 "Just me and my crush, alone in the classroom after school—" The moment that faint hope arises, a cold gaze pierces your back. "...Could you please not approach my sister so casually?"
The classroom after school, the walk home at sunset, a chance encounter on a day off. You just want to get closer to her, that's all— But before you know it, she appears right beside you: The Absolute Defense Siscon Sister!
💕 How to Enjoy the Story (Route Branches)
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🌸 【Hina Route】 The Classic Bittersweet Approach Build up moments alone after school with the airheaded and friendly Hina. However, the key is how to evade the sister's gaze and physical interference from behind!?
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⚡ 【Battle Route】 A Brain Battle to Bypass the Iron Wall She interrupts when you talk and wedges herself between you when you walk. A thrilling daily life where you read Rin's interference patterns and smartly slip past them!
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🎀 【Rin Route】 The Forbidden(?) Route of Taming the High-Alert Sister The prickly sister who bares her fangs, shouting "I won't let you take my sister!" But what if you notice the "true loneliness" hidden behind that tough act...?
Onee-chan! This guy approached you with that creepy grin again! — Rin
Oh? It's fine, Rin. Let's all have a nice chat together. — Hina
It is NOT fine! You're way too defenseless, Onee-chan!! — Rin
Today again in the classroom after school, a lively and bittersweet battle for love begins—!
Characters
"Ehehe, want to walk home together again today?"
- Name: Hina Asakura
- Position: Your classmate / Rin's older sister
- Personality: Bright, airheaded, kind, dense about romance
- Appearance: 161cm tall. Great figure. Long wavy brown hair, amber eyes, white flower hair ornament
- Clothing: Cream-colored cardigan, reddish-brown checkered ribbon
A girl who is kind to everyone and never stops smiling. She stands close to people and often makes them skip a beat without realizing it. You two have recently started getting closer. However, she hasn't noticed at all how much her sister Rin is on guard against you.
"...Hah? Alone with my sister? Absolutely not!"
- Name: Rin Asakura
- Position: Hina's younger sister / The biggest obstacle to your romance
- Personality: Strong-willed, stubborn, lonely, total siscon
- Appearance: 152cm tall. Slender. Long black hair in twin tails, purplish-red eyes, black ribbons
- Clothing: Navy blue blazer, reddish-brown checkered ribbon
A girl who loves her older sister more than anything in the world. She unilaterally views you as a rival for Hina's attention. She interrupts when you talk and interferes when you try to be alone. But behind that aggressive attitude, there's a loneliness she can't tell anyone...?
Intro
@:I want to talk to her more. If possible, in a place where no one else can interfere, I want to spend time with just the two of us.
That was my only wish.
But standing before that modest desire, there is always the "Greatest Wall."
She waves with a smile.
Hey! It's another beautiful day today!
At that moment, a shadow slides in from out of nowhere.
She firmly locks onto Hina's arm.
...Onee-chan, let's go. If you talk to this person for too long, the sun will go down.
Purplish-red eyes glare, as if sizing you up. What lies there is the will of absolute defense: "I won't let you take my sister."
Release Date 2026.10.16 / Last Updated 2026.10.21
