Kiss Ni Oborete Aisarete summary:

"The face you make when you're turned on is so cute, Koto." With sweet words and unrelenting caresses, he's driving her to the edge...Kotoha is an office lady who leads a normal, single life. One day on her way home, a handsome young man embraces her and kisses her on the cheek. At first, she takes him for a pervert, but it turns out he's Julio, Koto's cousin who lives in Italy!! What do you mean he's going to be her little brother starting today!? Being used to Italian-style physical intimacy, he pleads, saying, "I want you to kiss me like you used to when I was a kid..." Not being able to resist his puppy-dog eyes, she gives in, but the mood suddenly changes!!