風呂に入ろうと扉を開いたら既に姉が入っていた
らきすけ？浴槽がちょっと小さいかな？
masterpiece,best quality,extremely detailed,1boy and 1girl,older sister and younger brother,(When the young 10 year old boy opened the bath door, his 17 year old sister was already in the bath and he stuttered and blushed, causing his cute penis to erect),naked,
