Honki wo Dashita Onii-chan Nara Ishuuzoku Ojou-sama no Harem wo Tsukuru Koto Gurai Rakushou desu!
本気を出したお兄ちゃんなら異種族お嬢様のハーレムを作ることぐらい楽勝です！
The protagonist is determined to create a harem of noblewomen to support his younger sister, Luna. His first target is Lili, the daughter of the Duke of Angefort, who is described as an elven beauty from a prestigious family. She wears traditional elven clothing and has a wild, unpredictable nature. The story follows his efforts to spend time with her and win her affection. He is committed to this mission, regardless of the race or background of the women involved, as part of his duty to his sister.