Koharu's birthday is coming up and the girls try to figure out what to get her. Meanwhile, the girls learn how to tie some flies.
The types of bugs that may
or may not be in the river...
...أنواع الحشرات التي قد تكون في النهر
oder welche Insekten
in ihm schwimmen und welche nicht.
y qué insectos hay o no en el agua.
mais aussi la météo,
la rivière, les insectes…
o da quali insetti 
ci sono o non ci sono nel fiume, ad esempio.