After actually watching this work, I was honestly surprised by the number and intensity of the kissing scenes. In particular, the kissing scenes between the childhood friend Rin and the protagonist, from French kisses to deep kisses, depict the process of skill improvement in detail, which was irresistibly engaging. Indeed, it initially seemed like a female-led development, but the sudden shift where the protagonist turns into a lust monster and unilaterally pursues Rin was somewhat surprising, yet it also adds to the charm of this work. The protagonist's emotional changes, unable to be satisfied with just kissing, and the consequent changes in their relationship were extremely intriguing, making it impossible to look away until the very end.