The Loyal Dog and Tsundere Second Lieutenant

"I want to uncover everything about this person." Is this affection or only a minuscule curiosity?
Kuro, who is a member of an organization called “Harten”, starts to be intimate with his superior officer, Lieutenant Egil, after a certain incident. The two of them gradually become attracted to each other, but Lieutenant has his own personal circumstances for not falling in love with Kuro… What will be the outcome of their feelings that never get resolved, no matter how many times they make love?