I Lost My Girlfriend’s Older Sister’s to Berokisu Temptation Lemon Tanaka

彼女の姉のあざと可愛いベロキス誘惑に負けた僕 田中レモン

Also known as FSDSS-615

FSDSS-615: The protagonist goes to a blind date, without telling her actual girlfriend, and there meets with Karen, who gives him the cold shoulder. A few days later, he gets introduced by the girlfriend’s older sister for the first time, and it happens to be the very same girl. Now that she has him by the balls, she finds the situation particularly exciting. Pretty good. She has so much class and charisma.