There's a really strange twist in the love-(complex geometrical figure) in this volume. It was a surprise for sure, but it just feels so out of place and forced. Oh well, Chika-chan's really cute, so I won't complain anymore. Art saves the day, once again.
This volume ends at an anti-climax, which is kind of unusual. However, having the love-(complex geometrical figure) half-solved actually makes the future less predictable, so it might be a good thing.
By the way, who names their son and daughter Ryuutarou and Sumomo? It just seems unusual to me.
