It's mainly about the story centered around the characters in relation to the concept of a sister. Maybe it involves the relationship, the experiences they share, and how that relationship impacts their lives.
The translation of 'A Sister's All You Need' is quite good. It manages to capture the tone and style of the original work, although some cultural references might be a bit tricky to translate perfectly.
I'm not sure how popular it is. It might be popular among certain groups who are into light novels with a focus on family - like relationships, especially those centered around siblings.
I'm not sure specifically as I haven't read it in detail, but it's likely that there are characters who are sisters, and perhaps other family members or friends who interact with them.
Well, 'A Sister's All You Need' light novel has interesting storylines, relatable characters, and a world that draws you in. It offers a refreshing take on various elements and leaves you wanting more.
The biggest spoiler is a romantic development that you wouldn't expect. It completely throws the story in a new direction. But trust me, discovering it on your own while reading is way more fun.