12 Episodes.
First of all, if you're a fan of some warm, fuzzy, mild romance anime in which everything turns out for the better, you should probably watch this.
This is a really good romance anime which depicts the romance between the characters throughout the whole series. I enjoyed watching it from the start to the end.
Yes, as in all romance, there is competition and some feels too. But overall, it's very enjoyable. And it's got a complete ending unlike most romance anime I've seen.
The start of the anime is really nice and gets better as the series progresses. And the ending is something that depends on your taste. I won't spoil it here.
But do give it a watch. It is quite nice.