The anime is “Yozakura Quartet”. The TV series that aired a few years ago. I watched it a while back and it was really funny, and good. Except for the ending, which was not the ending I wanted. Anyway:
Nice. I grin from ear-to-ear everytime I see the scene.
PS. The “Yozakura” comes from Yo from Yoru (夜) = Night, and Sakura (桜) aka Cherry Blossom. Hope I can understand the naming significance someday.