Orgasm is the Essential Part of Sex!? When I Try to Teach My Dull Childhood Friend Thoroughly…

The scene opens with a flashback to the childhood of a boy named Yuto and his friend, a girl named Rosa. The boy tells Rosa that he wants to have sex with her, but she refuses, saying that she wants to be with someone else. When the boy asks her why she refuses him, she says that she does not want to go on a date with someone who does not teach her about love. She tells him that she has gotten a phone call and is waiting for someone else to come pick her up. She asks him to go with her to a place called "Where with me."