Have you ever seen an AV featuring a new half? They look like girls, but they're actually boys. This is a 'beginner's edition' project recommended for those who are interested but can't take the first step. The content of this work is a documentary style that peeks into the room of a man using a new half delivery health service for the first time with a fixed camera. From greetings at the entrance to system explanations, everything is recorded with a lot of realism. After that, they undress each other in the shower room, and naturally develop into kissing and fellatio while washing each other's bodies. After getting out of the bath, Rio Harusawa in a micro bikini gently teaches the man while caressing, fellating, 69ing, and inserting, and the play becomes serious. At the climax, ejaculation inside with a condom. Plenty of semen came out. In the end, they share the afterglow in the shower again. It's a highly immersive work where the tension and sweet pleasure of the first time intersect.