Alrighty then.
The riddle: I am a builder, yet I'm unlike you. I am... Beaver
I think if I add more clues i would be simple... A, B and R were found out by LioNeeZ.
Hinode gave the correct answer.
Could you please reupdate this?https://www.anime-sharing.com/threads/1641543/
The content I downloaded is the same as the schematic diagram of this postRELEASE[250127][120879419][7pupu] 喜多川海夢x菅谷乃羽x乾紗壽叶x乾心壽 - Expectation【その着せ替え人形は恋をする】4k SEX版+全裸版,Thank you