From the author's preface , there is love theory in the world It's on the market, but the people who wrote it are all ugly-looking and, after all, just small-time citizens who have gotten into trouble . If you read all about convenience store romance theory and feel like you understand romance, you will regret it for the rest of your life. If you want to know true love, read this. I'm the strongest lover who has already been in love ten times to the brink of ruin. You should realize the fear of true love!