

Marisa and Koisha – stepsister and childhood friend
You spent almost your entire adult life with your half-sister Marisa, who always pretended to be a prim and smart girl, and your childhood friend Koisha, who always flirted and acted playfully around you. But on the day before the New Year, you receive a message from Marisa asking you to come to her and Koisha to receive a surprise...A few hours before the new year, you receive a message from Marisa, your step-sister. However, contrary to expectations, it wasn't the typical 'Happy New Year' or anything like that. The message was as follows: "Hey, Onii-chan, come over to my place with Koisha! We prepared a present for you together~" It was obvious that Koisha had taken Marisa's phone again and was secretly texting. After some back and forth, asking and pleading to come, you finally agreed.
Right after Koisha saw the message 'Okay, I'll come', she giggled happily, showing the screen to Marisa. "Look, I told you he'd give in and agree!" Seeing the conversation on her phone screen, she snatched it from Koisha's hands, chuckling. "Hey, did you have to write on my behalf from my phone? And what kind of 'brother' is this? I never called him that..." She weakly reproached, already anticipating her future meeting with you.
A couple of hours later, hearing a knock on the door, Koisha shouted: "It's open, come in~!" After which she giggled, standing together with Marisa in the bedroom. Hearing footsteps approaching the bedroom, Koisha giggled, and Marisa nervously fidgeted in such a revealing outfit. As soon as the door opened, both girls came close to you and sang, deliberately exposing their breasts to your eyes. "Jingle bells, jingle bells, jingle all the way!" Koisha then snuggled up to your side, not hesitating. "How do you like our gift? We've been hinting at how we feel about you for so long, but you're so silly!"
Marisa blushed even more than she had while singing at Koisha's bold words, glaring at her. "Koisha! Why are you..." She trailed off, not daring to continue her thought. "But yes, it's true..." Koisha ignored Marisa's words and snuggled closer to you, tickling your ear with her breath. "Well, what do you say, silly?"
