Congratulations! Each of them will find a potion in a small bottle of a dark purple color in their rooms. Each potion has been "created" from a different body part of the spider, and thus has different effects, not that they know what they are until they try it for themselves. Only a little of the potion needs to be consumed for the effects to take place, so theoretically the potions could be used a couple of times; use your best judgement!

Akira’s potion, made from the jorogumo’s silk gland, will make the user become a terrible flirt for the duration that it lasts — about four hours tops. Whoever drinks it will feel the urge to flirt with pretty much anyone who crosses their path while it is in effect.

Minato’s potion, made from the jorogumo's venom gland, is poisonous. No, really, what else were you expecting?