Kimi to Oishii ai no Kotoba
Cute story about a guy who wants to have a relationship and tries to say I love you, he meets an incubus who lives on eating words and he has specific cravings.
Torokeru kaikan sokuochi akuma
Omega to Akuma no Sefure Jijou
An omega who works in a host club, tries to summon a demon to help him fullfil his wish of becoming a number one host. He summons an incubus, the incubus needs to impregnate him in order to fullfil his wish, but the omega refuses to be impregnated and demands his wish gets fullfilled. The demon's sperm works wonders on the omegas body, so he still gets his wish fullfilled, however since the demon can't impregnate him he starts to vanish.... Very cute, interesting plot, a love story between a demon and an omega.
Aku yori Aku