Nekonade Distortion Ren'ai Jishou no Dead End

This is a crowdfunded fandisc for Nekonade Distortion. One day, Tatsuki’s childhood friend Yuzu turned into his little sister “Kotoko”. When he went to his mother Shikiko for advice, she was “Kotoko” as well. Then his older sister Yui showed up in front of him… as “Kotoko”. Everyone that he knew had turned into “Kotoko” on the inside. What exactly had happened?! What should I do?! “Nii-san, this is the DEAD END world.” “Soon, you will become me as well.”