To ensure ssama gets recovered longer, she needs to take some w33d! Why!? Because chemo kills! Every1 let her know... well idk if w33d is avaliable in korea... huh... have to think this thru more thoroughly... see you in 2k17!! jajaja
I think Honoka means that Kotori smells like sweets because she's thinking about food while Umi is thinking about how Kotori smells good in a more sensual way.
Or, alternatively, it's a lost in translation joke where maybe "sweets" sound similar or sounds like another word for something more explicit.