KNIP-008 My older brother, who had zero knowledge about romance, somehow got a girlfriend, and I realized my own feelings. A younger sister’s lesson in youthful relationship education, taught by me. Mihiro Tanaka’s explosive debut

Mihiro learns that her unpopular older brother has finally gotten a girlfriend he has long hoped for. Unable to honestly celebrate, Mihiro gradually realizes her true feelings: I’ve always liked my brother…

The day before his date, she tells him, If you finish too quickly, she might end up disliking you. I’ll be your practice partner. From a passionate kiss to helping him with her feet, oral practice, and more, she gives him a hands-on lesson in romance and intimacy. She also advises him not to forget protection and encourages him to be more confident. With her expressive, lively personality, she teaches her brother about relationships in a fully immersive, first-person style. Includes several affectionate intimate scenes. Some scenes have been edited with generative AI.