The Sisters’ Underwear Situation

The Sisters’ Underwear Situation, also known as Big Sister and Little Sisters’ Underwear Situation or Kanojo to Kanojo no Shitagi Jijou, is a Japanese light novel that follows Souma Akito, a young man with dreams of entering the women's underwear manufacturing industry due to his love for female breasts. To pursue his passion, Akito joins the tailoring club to acquire the necessary skills. However, his life takes a strange turn as he encounters the sisters within the club, leading to comedic, ecchi, and romantic situations in his school life.