高〇生にもなってサンタを信じてる幼馴染の女の子を
子供っぽいっとバカにする反面 内心安心していたが
実はもう彼の知らないところで体の相性抜群な年上のパートナーを作っており
夕方一緒に帰った童貞のことなんて頭から消えるくらい
性の6時間みっちりマジイキセックス仕込まれちゃってる2P漫画

This is a 2-panel manga about a boy and his childhood friend, who still believes in Santa even after becoming a high-school student. Although he makes fun of her, she actually brings him peace of mind. He didn't realize it, but at some point her body grew up to become an excellent partner, and one evening they go home together. They have intense sex for 6 hours, enough to make him completely forget the image of a virgin he had in his mind.