Hirose Anna Teases Brother with Forbidden Sisterly Temptation

Hirose Anna, a 23-year-old woman, discovers her younger brother has been indulging in fantasies involving her underwear. Instead of confronting him directly, she decides to take control, gradually revealing her provocative side to him. As the situation escalates, Anna openly offers to guide him through his sexual curiosity, setting boundaries while allowing him to explore his desires. She embraces her role as an older sister, fulfilling his increasingly explicit requests while maintaining their complex relationship.