Fridge Horror: Suzuran returning as a ghost. Whether she's dead or not (the latter is still possible thanks to the island not being a stranger to the supernatural) it still begs the question: what really happened to her that no one even found out about it?
Fridge Logic: Apparently, it took Beniyasha less than a day to write and publish an adventure based on his antics.
Uncanny Valley: One chapter shows that Mei Mei really likes to make costumes based on normal animals (that is, the ones outside of Airantou). Ikuto and Tohno, having been already accustomed to the appearance of the latter set of animals, were caught completely off-guard.
Values Dissonance: Some, in that Yashiro, Machi and Ayane's great-grandmother claims to be 64...which means that each generation would have had to give birth at age 16.
The Woobie: Suzu. Both parents missing, and her feelings are conflicted over wanting Ikuto to either stay or leave the island. Ouch.