Katekyo: Kireina Onesan to Himitsu no Lessons (Tutor: Secret Lessons with a Beautiful Older Sister) is a visual novel that explores the classic trope of an academic relationship evolving into a clandestine romance. The story typically centers on a young male protagonist and his attractive older tutor, focusing on the tension between their professional roles and their growing personal intimacy.
“Too close to what?”
That was when the arrangement changed.