Joined: Jan 2015
Wikipedia said:I think by that logic it should be counted in Winter since it is starting and ending in March, which falls under Winter.
Japan has four television seasons: Winter (January–March), Spring (April–June), Summer (July–September), and Autumn or Fall (October–December). Some series may start in another month though it may still be counted as a series of a specific season.
It is listed as a show airing in Winter by anichart.net