Ji Seong-il, the main character, has a younger sister named Hyo-yeon, and the protagonist's friend, Kim Jun-yeong, has a younger sister named Yoon-young.

[Protagonist] I wish Yunyeong was my younger sister.

[Friend] I want Hyoyeon to be my little sister.

[Leno] Then I'll change your younger siblings.

[Protagonist] Who are you!?

That's how the main character's younger sister became Yunyoung, and the story of her friend's younger sister becoming Hyoyeon.


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Simple character introduction that can be understood at a glance

Ji Hyo-yeon - My sister, but she became my friend's sister.
Yunyoung Kim - My friend's sister, but she became my sister.
Leno - I switched my sister and my friend's sister.
Jasmine - Mysterious older sister who accompanies Leno.
+ Other men.

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Have you tried swapping my sister for a friend's sister?

This game is "Let's make a bright and cheerful game that you can enjoy with your head empty." It was created with the thought of It is a simple and ordinary content that is difficult to find emotion, foreshadowing, reversal, and novelty.
So, if you want a different experience, I think you won't be able to meet your expectations.
There is no voice or CG.

Recommended for

- People who want a game that can be played without thinking
- People who prefer bright and light content
- Those who have difficulty installing large-capacity games due to lack of capacity

Not recommended

- People who like games that are touching or well-organized
- People who want to have something left in their mind when they finish the game
- People who want novel content that has never been seen before
- People who have trouble without voice or CG


※ On a device that does not have Adobe Air installed, the process of installing Adobe Air is required when starting for the first time.