The Loose Cat Can't Resist Possessiveness

Overview

Kyosuke never thought that he'd ever be content with just one person, but now that he has Fujishima in his heart and on his bed, suddenly everything is different. From soft kisses to sharing spare keys, every first between the newly-minted lovers is uncharted territory, but with both their busy schedules it's been hard to get some time just to themselves. Is this the biggest of their problems, however, when Kyosuke gets a threatening letter in the mail? (Source: Futekiya) Note: Includes one extra chapter.

Source: AniList