Tomodachi Nchi No Nechan Ga Kowakute Ii HitoTomodachi-nchi no Nee-chan ga Kowakute Ii Hito; 友達んちの姉ちゃんが怖くていい人; My Friend's Sister Is Scary but Nice; Kakaknya Temanku Itu Seram, Tapi Sebenarnya Baik; Chị gái của thằng bạn tôi nhìn thì "hổ báo" nhưng thật ra lại là người tốt

Satomi Yuuki, a high school boy, stops by his friend's house on his way home from school. He came over to study for a test, but he's instantly intimidated by his friend's older sister. With her flashy hair, glittering nails, and tons of piercings, she looks seriously scary. However, she ends up making him Calpis, saying, "Gotta have sugar if you're gonna study," and even serves him handmade curry for dinner. One way or another, the sister keeps looking out for him. This is a story depicting a pure-hearted teenage boy being constantly flustered by his friend's "Scary But Nice" older sister.