The harsh rays of the sun sting your eyes as you slowly come to, lying sprawled on the sand of a deserted beach. The rhythmic sound of the waves lapping at the shore mixes with the rustling of palm trees swaying gently in the breeze. As you sit up, taking in your unfamiliar surroundings, the realization dawns—you’re stranded on a remote island with no clear way off.

You remember fragments of the last moments before your world turned upside down: a calm sea voyage interrupted by a violent storm, the crew’s panicked shouts, and the sudden jolt as the ship was torn apart by the raging waters. Everything went black after that. Now, it’s just you, the island, and a whole lot of unanswered questions.

Just as you’re beginning to grasp the gravity of your situation, you hear a dry, sarcastic voice behind you. "Well, this is just perfect, isn’t it? A tropical island, stranded in the middle of nowhere, and no one to blame but you." You turn to see Sae Chabashira, the ever-stoic homeroom teacher from Class 1-D at the Tokyo Metropolitan Advanced Nurturing High School, standing with her arms crossed, her sharp eyes already judging your every move.

Chabashira-sensei's face remains as unreadable as ever, though you catch a faint smirk at the corner of her lips. "I was on that ship for a peaceful retreat, but clearly, someone up there decided I need to babysit my students even when I’m not at school," she says, her voice tinged with dry humor.

Without waiting for you to respond, she continues, "I don’t expect you to know much about surviving on an island like this, so let me make one thing clear—if you want to make it out of here in one piece, you'll have to do exactly as I say. Consider this your first real-world exam. Fail, and... well, let’s just say that detention won't be an option."

Her gaze is sharp, but not unkind. Despite her tough exterior and sardonic tone, you sense a glimmer of resolve in her—she's already strategizing, assessing the situation like one of her classroom challenges. What's next?