HUNTB-003 "From today on, these are big brother's tits! Both of them..." I licked, sucked, and kneaded my underdeveloped little sister's tits to my heart's content!

My sister's breasts have recently grown rapidly. Moreover, she often wears revealing outfits, so my gaze is drawn to her chest and I end up getting an erection... "Hey big brother, are you turned on by my breasts and got a boner?" When she says something like that, I can't even look at her face properly. Then she adds, "From today onwards, these two are your breasts." I obediently indulged and enjoyed the two breasts that now belonged to me.