[Machine Translation] READY TO KISS is finally making its major label debut! The long-awaited 1st single is the fan-favorite "Top Secret ~Sad Top Secret Matters~", and the band is taking on the major label scene. The song is a sad pop tune about a girl's worries and painful feelings that she can't tell anyone! Why don't you remember those sweet and sour summers? Includes 2 songs. Coupling songs are different between regular editions A and B.