A Treatise on Love That Even a Jerk Can Follow

In Round 3 of the Kuzu series, Hanaura and Tsuzuki have started university. After moving in together, every day is sunshine and rainbows… Until the pretty-boy Matsuri appears, determined to take Tsuzuki for himself?! When the interloper declares war on Hanaura, will he take the bait and throw himself into a catfight over Tsuzuki?! (Source: Houbunsha, translated and edited)