るな & 北こうじ Costar Works

るな and 北こうじ are an established costar duo, teaming up across 2 works from their initial collaboration 'デリバリーSEX アナタの自宅に国民的アイドル逢坂はるなをお届けします' (2014) to '電車で、私だけ水着。弱み握られたKカップ少女はスク水通学を強いられ集団痴●魔に公然わいせつ。 天音るな' (2026). Their collaborations are predominantly released under the kawaii label, demonstrating exceptional on-screen chemistry in genres such as 水着・美少女・女子校生.