this work features many scenes that women dislike! sexual harassment training edition! yui has always hated her grandfather koutoku, who is talkative and stubborn. now a university student living apart, but koutoku has a slipped disc and agrees to take care of him over the summer in exchange for covering the cost of driving school. however, koutoku becomes enraged by yui's casual care and lusts after her abundantly grown body! "this is what care is all about," he teaches her how to handle an old man's cock.