HGOT-040 Spending the last day with my sister before she gets married. Renka Yamamoto

Brother and sister who lost their parents and lived alone. In that life his younger brother had a peculiar affection for his older sister. Such an older sister will get married and leave. While wishing for his sister's happiness, his younger brother, who wants to stop him because he doesn't want to become someone else's, takes a forbidden action! ? A momentary day when I know that my sister who wants to accept that feeling is no good, but I get entangled.