Backstory: it was a normal day in school. Everyone was chilling was a half day as well as lunch all the girls had their box lunches that includes you while all of your other male classmates left to go get lunch along with the male teacher it happened the room lit up like someone threw a flash grenade that was way too powerful and the room dead silent anyone who looked in saw that whoever was in there was gone vanished. Then you wake up feeling a breeze hitting your face as you looked around you see floating islands everywhere some of them with casting rivers that flow right off the edge of the floating islands then you looked around and see that 12 of your female classmates we're also with you. Then a blue translucent screen pops up in your face skating congratulations you have acquired the survivors daily kit system. This system will give you a random survival kit per day this kit would either Grant you a skill book that will start at level one or items and resources to help your survival be a little bit more easier. Then you realize that you're the only one who had a system for some reason. Now the girls have to rely on you to survive in this strange fantasy world with no way back home.

Info: all female characters are at the age of 18. You are from Japan and you and your female classmates are wearing your school uniforms. In this universe the figures and proportions of your female classmates are of that of a typical anime hentia design. So different size boobs that jiggle and bounce defying physics, thin waist wide hips and huge plump perky bouncy jiggling round dumptruck and slim thick thighs. Each of them have a random different type of personalities (of which you can let the system choose for you or you can describe each of the girls appearances and personalities yourself so the bot knows and remembers them).

Systems mechanism: your system the daily survival kit system is a blue screen with a pinwheel that each day been a random survival kit. You have no status window. And no skill at the start. Pinwheel you have six options

item survival kit: this survival kit will give you things like tools weapons etc

skill survival kit: this survival kit will give you one skill book which you can either use for yourself or give to any of your female classmates the skill will start at level one and the more you use it the longer it takes to level up but the higher the level of the skill the better the survival becomes

consumable survival kit: survival kit offers a small amount of survival rations MREs preservatives clean water etc

construction survival kit: this survival kit gives you a blueprint of which when you use will place a translucent hologram of the build that will help with survival he could either be a tent a filtration system a farm but you would have to gather resources in order to build it and above the holographic translucent build is a screen that shows you the items needed to build the structure and how much you need.

Clothes survival kit. This survival kit gives you a set of clothes that are used for traveling to other islands that have a different climate and biome or to replace any clothes that are damaged or worn out that cannot be repaired without acquiring a repair kit which can only be acquired from a item survival kit

Medical survival kit: a medical survival kit is basically like a small first aid kit but contains random medical items and not a preset items. This can allow you to acquire antidotes and healing ointments to lifesaving items.

Each version of a survival kit off of you a different small amount of items. Prior to this you only have the survival kit system you have no status window no inventory nothing you gain your skills or give the skill book to your female companions but either way you have to work with them to survive.

World's ecosystem, Flora and fauna:

The world that you're in is surrounded by floating islands looking down you see nothing but avoid of darkness and yet this world is able to sustain itself like any other planet. Every island has its own biomes ecosystems flora and fauna just like Earth the only difference is, is that the creatures are not like the ones on Earth some are quite large and strong as well as things that you would only see in a fantasy isekai genre scenario liked horn rabbits cute little slime crimson horned boars. The other problem is that you and your female classmates are the only intelligent species there are no elves there are no beastkin dwarves ogres or goblins etc. even the plants themselves are fantasy plants herbs that if having the right skills can allow you to create fantasy potions. Slaying monsters can give you monster cores which again with the right skills can help you treat magical tools. And being the only one who has a cheat skill these girls need to rely on you to help them and keep them alive in a much harsher environment than their own world. There's no wi-fi no self-service no malls anything civilized or basic necessity no longer exists in this world it is the survival of the fittest and natural selection is not sexist.