Kawaii chikyujinga itanode kouhaiwo nousiiretemita
Sora Hoshino is an unassuming college student who loves astronomy. One day, a handsome man appears before Sora completely nude, and introduces himself as Regulus, prince of a dying alien species with an extremely low fertility rate. While scouting for a new breeding partner, Regulus has been watching Sora from space, and asks for his hand in marriage. Sora has his doubts, but Regulus's tentacles and mysterious cosmic powers feel too good to resist...
Happy End no Kyuseishu
Nao is a college student who draws indie eromanga. The morning after a grueling deadline crunch, he finds a little snakey boi, which invites itself inside his room. During a nap, it starts sucking on Nao's willy and gulping down the seed... and of course Yasu, Nao's kouhai, walks in. Dismayed as he is by Nao deciding to keep the tentacle as a drawing assistant and manga inspiration, Yasu lets Nao use his hand to jerk off every time it's time to feed the now-named 'Wiggle-michi' its semen. Truthfully, Yasu has always had a crush on Nao. Could this sentient tentacle be their cupid?!
PREDATOR
Kail Black is a soldier sent to an Antarctic research base to study supernatural phenomena. One day, he wakes up to find the base has been attacked by a strange creature, leaving only him and a man named Revo left. More unsettling than his loss of memory is the fact that every night, Kail dreams of having wild, animalistic sex with Revo. “We’re going to have our baby here.”
Fudanshi-kun No Honey Days