[Ao]

"Please… be gentle with me!"

With teary eyes, Kosaki said with a tone of embarrassment as she is revealing her vagina to Ao.

He nodded in response as he immediately put his thing inside of her. She let out a hurting voice so he immediately stop before he starts to move his hips.

"Don't worry about me. It hurts but I kind of feel good…"

Realizing her own words, she covers her face with her hands. He doesn't know how to respond but since he knows that she is a kinda masochist, he surprised her by ravaging her inside without her permission.

"Eh? What? nnnnn~~~! ah~~! wait! stop! nnnnnn~~~!! this~ it hurts! it hurts but it feels good~!"

She tries to hold back herself at first but in the end, she follows her instinct as she makes an ahegao expression and moans like no tomorrow that makes Ao feel more excited so he pounds her inside more and more. In and out, until some white transparent juice comes out of her body.

While this happened, Haru who was watching at the side, can't help but start to touch herself. 

She never, even in her dreams, sees her big sister make such kind of sound and expression. 

However, instead of feeling disgust for her sister, she even imagines herself to be in her stead right now. This makes her fingers in her vagina fasten as she pinches her pink nipples in her modest breast.

Coincidentally, as her big sister was about to cum for the third time, they cum at the same time while Ao releases his white stuff inside of Kosaki.

Kosaki feels electricity runs into her body after he cums inside of her. Her body is more sensitive than usual because of Ao's cause which leads to her consciousness disappearing.

Seeing her big sister gets knocked out, she looks at Ao and he does the same too.

Her body trembles, not in fear but excitement.

Seeing her in this state, he immediately stands up and gets her. He carry her like a princess as he lay her next to her sleeping big sister.

They look into their eyes passionately as he kisses her on her lips and delays inserting his thing.

Now that she felt a bit calm, he suddenly input his thing, right after they separated from kissing, which makes her surprised as he makes disgust on his face.

Seeing his expression, she can't help but feel more excited even though she knows that this is not something she prefers however her body says different.

Being excited while someone is looking down on you is something ethics will reject but her instinct tells that she wanted more~ more~ more~ 

"Look down on me! Bully me! More~! nnnnn~…!!!"

She shouts and moans with excitement and hunger in her voice.

He started to move his hips uncontrollably cause her moans became louder and her face is now making an ahegao expression.

This caused to wake up Kosaki. Seeing her little sister in this state, she can't help but remember what happened earlier. She felt embarrassed that is enough to hide from Ao for a day but she wouldn't do that because… {I couldn't live without seeing him anymore.}

While she was thinking this, Haru cums as she felt electricity in her body right after Ao also cums inside of her.

After putting out his thing, they can see that it is still up until now. As of now, they realize that no fight happen earlier but a massacre.

He was about to input his thing to Kosaki again when suddenly the door opened.