The Four Seasons[]
The five teams according to season
A main topic of Four Seeds naturally are the four seasons, since every team is named after one of them: Spring, Summer A/B, Autumn And Winter.
The team members were chosen into their teams based on which seasons their names matched best (take a look into the Characters section for more information about that).
Almost every 7 Seeds chapter arc is named after one of the 24 solar terms consisting of the 72 pentads (Shichijūni kō). The Rainwater chapter, for example, completely consists of Shichijūni kō.