One day, when the protagonist leaves his room, he finds a pink rotor in the hallway. He first thinks it's one of his sister, Ayame, but she tells him it's not her, before going back in her room. The next day, he finds a vibrator in the hallway. Again, Ayame insists that it is not hers, but the hero turns on the vibrator and presses it against Ayame's crotch from above her skirt. Ayame flushes and goes to her room again. The protagonist senses Ayame's desire to do something naughty with her brother, but her pride won't allow her to ask him to do it, so he goes to her room and starts attacking her with a vibrator. What is the end result of this battle of wills between brother and sister?
 (Source: GOT corporation, translated)
 Note: Published in Comic Grape #50

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2. Imouto Lesson (妹レッスン); Comic Anthurium 2014-05 
3. Nee-chan no Sakauramix (姉ちゃんの逆恨みっくす); Comic Anthurium 2016-01 
4. Imouto no Iiwake (妹のイイワケ); Comic Anthurium 2015-05 
5. Ane ga Shibashiba Tsuyappoi Kao wo Suru node, Totemo Dogimagi suru (姉がしばしば艶っぽいカオをするので、とてもドギマギする); Comic Grape Vol.13 
6. Kyoudai no Himitsu no Su (兄妹の秘密の巣); Comic Anthurium 2016-10 
7. Kaisoku Ane no Koukishin (快速 姉の好奇心); Comic Anthurium 2017-03 
8. Imouto no Mono Hoshige na Shisen (妹の物欲しげな視線); Comic Grape Vol.50 
9. Imouto no Shinro ni Tsurekomare (妹の進路に連れ込まれ) 
10. Ane no Berochuu (姉のべろちゅー); Comic Grape Vol.142 
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