His childhood friend deep kissed him when he visited his girlfriend for the first time and reunited with his childhood friend. That was also the first time he lied to his girlfriend. It was actually well-written, because they started dating just recently and one of his friends was somewhat of a playboy who told him that 'cheating' is also a way to be in a relationship and that 'lying' was just a part of it. MC's dad is a cop and the MC himself is a rather serious person and you will actually see some good moments where the MC stands up. The only thing that makes the MC look indecisive is him being unsure if he is still in love with his childhood friend, despite being also in love with his girlfriend.

The rest of the story really consists of the MC bumping into his first love over and over again just by chance. He talks to her and kind of worries about her and her own issues. He wonders why she tries to seduce him. He resists of course but can't stop thinking about her after all. There are some good moments, where she tried to blackmail him with a kiss photo but he straight up drags her to his current girlfriend, confesses everything and begs her for forgiveness. I never expected that to happen but props on the MC for that.

After a lot of arguing, he and his first love somewhat make up, he still resists her advances yet can't fully let go of her either, still thinks about her while he walks next to his girlfriend and stuff.

As expected, it ended with a cliffhanger, author added in the afterward what he wants this story to be and I assume he needs one or two additional volumes for that. He's aiming for pure love yet twisted somehow, mirroring his other work : "You Are the Daughter of My First Love."