Sumika Murasame's friend, Ushio Kazama, reveals that she has a crush on a sec...
Sasamekikoto
Season 1 Episode 12: Ame o mitakai
On a rainy day, the gang discover a hidden note in a book referring to a certain thing, so they decide to search for it. After some investigation they find a key to a locker, but are reluctant to go to the boy's locker room, so Sumika gets Masaki to go for them. The locker contains another note mentioning a German person. With Azusa's help, they make the connection to the pictures of German musicians in the music room. This leads them to the creek (which in German is 'Bach'...