Episode 5 was a nice and brief introduction to Rantarou and another good improvement for Ichigo. Once again the brief jokes in each episode really brighten up the atmosphere and further add to the happy-go-lucky vibes I get. My favorites were when Aoi went "tehe xP" on Ichigo. Or when Ichigo actually carried 10 books on her head?! And then fell down but... wow.
Anyway, it seems like Ran-chan is a very nice addition to them. Now we have Aoi as brains and Ran-chan as real life experience to support Ichigo on her goal to become a splendid idol. As
Liddo-kun mentioned, I would find it very satisfying if they became an idol trio because I think they already started to get along very well this episode. That would outdo the legendary idol duo, right?
As for the next episode... I can already see we're in for some more entertaining Ran-sama and Ichigo antics.
I look forward to it.