Tsunami girl is genuinely a really great book. In the beginning, the writing feels simple and its interjection with the Manga panels janky. However, once you get used to this it serves the story well. 

Yuki's relationship with her grandpa is beautiful and her coming to terms with her trauma through her journey with taka is emotional but well-earned. 

One thing I enjoyed is the way myth and folklore was used as a way to explain Yuki's and Taka's experience; it placed their trauma in a greater whole but there still remained a hesitance as to if what they experienced was real.