![1boy 1girl arm_up bed_sheet black_hair bow bow_panties commentary_request cover dr_rex fake_cover futari_ecchi head_out_of_frame hetero implied_sex knee_up long_hair lying nude on_back onoda_yura open_mouth panties panties_around_one_leg pussy_juice_stain red_panties sweat translation_request underwear upper_teeth very_long_hair wet wet_clothes wet_panties rating:q score:8 1boy 1girl arm_up bed_sheet black_hair bow bow_panties commentary_request cover dr_rex fake_cover futari_ecchi head_out_of_frame hetero implied_sex knee_up long_hair lying nude on_back onoda_yura open_mouth panties panties_around_one_leg pussy_juice_stain red_panties sweat translation_request underwear upper_teeth very_long_hair wet wet_clothes wet_panties](/cdn_image/preview/ef/37/ef3755b18a01c97f64e66f4f78866ed9.jpg)
A relatively softcore and semi-educational manga series that explores various aspects of sexuality and relationships, mostly through stories involving a newlywed couple, Onoda Makoto and Onoda Yura.
Its basic plot was teaching a previously virginal man how to please his wife, who wasn't particularly sensitive, through the advice of his experienced older brother.
If used as a reference inside another work, it's probably to say "this character doesn't understand how sex works" and/or "you lost me".