As long as Hata-sensei doesn't cause this series to have a tragic end, he can set red flags left and right. I suspect Tonikaku Cawaii (ugh -- I still hate that Sensei and/or his editor felt the need to use a C instead of a K for kawaii) is Hata-sensei's way of retelling the "lovers separated" story he tried to force into the end of Hayate the Combat Butler. In that manga, he failed 'cause Hata-sensei's ship was the one least supported by folks, thus negating its impact.
Here, there is no harem, so if Tsukasa is separated from Nasa (due to external forces likely coming into play), it will mean something, as will Nasa's attempts to either get her back or join her where she is.