From Fantasyshrine:

Like the Snow Queen from the same titled novel, Steve Nohgue is famously known within the elite business world for his looks and shrewd mind. Steve has always been used to having everything he wants, including his assistant, Moridono, who has pledged his loyalty to protect and to serve him. Until one day Moridono announced that he no longer wants to be by his side… Why did Moridono abruptly leave his side? Will Steve ever be successful in love as he is in business?!

Adapted from the popular novel, this book also includes a short story of Sagishima x Hokuto from Dekiru Otoko.

Sagishima Takehiko, Hokuto's distant benefactor throughout his growing up with foster parents, is a successful executive. When Hokuto turns 20, he appears in his life in person and turns it upside down in order to groom Hokuto as his successor. But is that all he is, a benefactor? Hokuto wonders whether he might not have a secret reason for his kindness to a supposed stranger. But when he finally gets to ask the question he has pondered all his life, the way Sagishima responds is... surprising.