for the first, i just know dj with that plot. here's https://myreadingmanga.info/harikonotora-midou-eyeshield-21-dj-yajuu-no-setsuri-eng/
not a beast but had impossible dick https://myreadingmanga.info/totsuka-turns-hachiman-bitch-elephant-cock-eng/
I am not sure...
Is that it???
http://www.mangago.me/read-manga/eyeshield_21_dj_seiyoku_shori_qb/
I probably shouldn't be asking on a different website but does anybody know a yaoi manga where there is this really big beast like seme and the uke is a normal sized guy that has to take on the seme's impossible penis. There's a also a side story attached where's twin guys and one tentacle are the seme and there is only one uke for them all. I think i read this in myreadingmanga but I don't remember. Thx in advance