ANREALAGE's standard line, anseason, will be released in July for the Spring/Summer 2018 men's and women's pre-collection seasons. Launched in 2014 as "anseason anrealage," the line offers everyday basics like shirts, trench coats, and denim pants, in contrast to ANREALAGE's experimental approach, which changes themes each season. Previously, anseason's collections were released in February-March and September-October, along with the main collections, but this time, the brand announced the collection earlier, expressing its desire to "establish a new standard by incorporating themes and techniques that ANREALAGE has pursued in the past, rather than limiting it to a six-month seasonal cycle, and creating pieces that can be worn for longer periods across seasons." For the Spring/Summer 2018 collection, the brand expanded its women's offerings, offering 25 styles for both men and women, totaling 50 pieces. The lineup includes a jersey set made from a patchwork-style material incorporating over 15 different knit fabrics, a dress with buttons encasing dried flowers in resin, a blouse printed with the same resin-processed dried flowers, mosaic-patterned denim, and iconic wide shorts.

In addition to the announcement of the items, looks have also been released. Models include Serina Mottola and Yoriko Oyamada, son of Keigo Oyamada of Cornelius.