Jantteung Jeojeun Yeopjim Eonniga Manjyeodallaneundeyo?

The low-class next door sister, she comes into our house on a rainy day and says.. (Source: Ridibooks, translated) Note: Part of the 2024 Post Type GL Summer Anthology ([GL] 2024 포스타입 앤솔로지 | 여름).