'to Yoru To Asa No Uta' (first part) or 'Yoru To Asa No Uta EC' (sequel) by Hadara.
idk is seme is 'traditionally masculine' or not, but, he is shorter.
I have a list for taller ukes which usually has short masc seme -> https://www.mangago.me/home/mangalist/3028433/ but ill pick out some that fit ur desc
https://www.mangago.me/read-manga/dekoboko_sugar_days/
https://www.mangago.me/read-manga/dekoboko_bittersweet_days/
https://www.mangago.me/home/mangaphoto/yoru_to_asa_no_uta_ec/
https://www.mangago.me/read-manga/soshite_boku_wa_koi_wo_shiru/
https://www.mangago.me/read-manga/call_my_squall/ (Kind of, hes more masc at least during smut scenes)
lucky paradise
slightly shorter but masculine seme anyone???