I don't really get why people are calling Ibee stupid, she was pretty rational and used the servant's corridor (that only servants use because "noble" people don't like seeing servants around) to go get some food 'cause she was hungry. What was she supposed to do? Sit and starve in her room? Even just ignoring the fact that she would normally be told of for lazing (since Lily is covering for her it's fine), she doesn't need to sit in one place. Normally a prince does not rush into a servants corridor (ever). He especially does not do so to look for a maid he met once, doesn't know the name of and just wants to tease. That's just the comic plot causing hi to do that, she was right to think he wouldn't see her if it was more realistic.