COTE: Collect All the CGs

Shikime Natsu accidentally transmigrated into the world of Classroom of the Elite, arriving at the Tokyo Metropolitan Advanced Nurturing High School—an institution boasting a 100% employment and college advancement rate. Upon meeting Horikita Suzune for the first time, he completed the "First Encounter CG" collection and obtained the Skill Card: [Sixteen Hours of Effort]. (Effect: You have already worked hard for sixteen hours; the rest is break time. Upon use, your knowledge will continue to grow for the next sixteen hours—even while eating or sleeping. Cooldown: 3 days!) Upon meeting Kushida Kikyou for the first time, he completed the "First Encounter CG" collection and obtained the Item Card: [Voice Recorder]. (Flavor Text: Take this pen and begin your solo run!) Shikime Natsu only wanted to complete his full CG collection and get stronger along the way, but before he knew it... how did he end up winning over all of them?