#1
*seme's brothers appear in the "Program" & "Arrogant Prince (Gouman Ouji)" series.
The 2 & 3 manga's with this couple are not available online as of now, however I've linked their "mangaupdates.com" profile pages below.
Kousoku Program
#1 in "Program series"
Haruma is a member of the wealthy Kagetsu family. He's decided to move out for collegee so mother has hired Shoyo Kurehashi, a bodyguard. Shoyo fends off a would-be groper on the subway, and in exchange for his silence about the incident, Shoyo requests Haruma for himself. Haruma has his first kiss stolen by Shoyo.
#2 of the "Program series"
#3 of the "Program series"
#4 of the "Program series"
*spin-off of the "Program series"
Muzaffarid, the crown prince of the oil-producing country of Jalal, and his bodyguard, Akito Kurehashi.
There are 3 complete volumes, this is only volume 1.
Egao no Ura ni wa