Kami Ato ni Kuchizuke: sweet time

Seiichi Kurusu and Nao Seto are officially dating and living together.
Even though they share a home now, their busy jobs have made it difficult for them to spend time together. When Seiichi reveals that his father has been trying to set him up with marriage interviews, Nao realizes that he doesn't want to let Seiichi go. With Seiichi's position as the eldest son set to inherit his father's company, will they be able stay together forever?
(Source: Tokyopop)
Note: Contains a bonus chapter.