Ch .1-4: Hayato and Atsushi are two super-hot men and are known around campus as King & Prince. The truth is Hayato is doing it with Atsushi... as much as Atsushi would allow him! However, the outwardly boisterous Atsushi revealed his love struck side only to the legendary womanizer Kaiser.
Ch. 5: Two male companions are chosen by a prince to pleasure him and they are really good because they practice with each other each night.
King & Prince + Kaiser