A bit sad that the developer didn't bother to add an ending in which we can save the boy and be the hero, managed to do all the game in the first day, for those that wanna do it in one day without going back (until you meet the succubus):
-Take the 2 potions and the shield in the village, equip the shield
-Sell the 2 point at the pawn shop and buy the weapon of 100 gold then equip it
-Fight your way through the forest, overall you shouldn't fear any slime, the green ones take 6 hp and gives you a 10 hp potion so it's worth to kill them all, blue slimes will take 1 hp and have a 50% chance to give the 2hp potion.
-Accumulate all defensive equipment then go to the bandit camp
-Evade most fights, you only have to kill the ones guarding the chests or that are in the middle of the way
-Go to the left side of the map when you can, you need the attack amulet so that the bandits will take 4 HP rather than 6
-You can choose to not kill the bandit leader if you want, the yellow slime isn't truly strong and you can defeat it while fully healed, and you can get the katana below to kill it easier later on.
Overall I missed a good ending in which you don't betray your friends.