In Seiren, we get to watch three separate mini-series style storylines featuring the school life of protagonist Kamita Shoichi as he gets involved with our three female leads: Tsuneki Hikari, Miyamae Toru, and Kyoko Tono. Over the course of three 4-episode arcs, you’ll get to see his relationship with each of these young ladies develop in pretty standard slice of life form.
If you’re afraid that you might be stepping into harem territory here, fear not. There are no harems here, only pure slice of life. You see, the show’s writers chose a unique format… each 4-episode arc occurs in the same year, but on a slightly different timeline. Essentially, each four episodes assumes that the other episodes haven’t happened and won’t happen and provide a complete story.