"The cause of the couple's parting, the first is gender disagreement ...?" Jun, who just had a boyfriend, feels uneasy about his technique ... Practice with me (elder brother) who lives together! ?? "I don't want to be disliked by my boyfriend, so let me practice with my brother." My sister who tries various blowjob techniques that I searched on the net, but I shouldn't be addicted to my sister's blowjob ... At first, I was thinking of'practicing', but when I realized that I was just licking it ...!