Upon arriving at Sunshine School, transfer student Aoba Shunsuke found the premises completely deserted. He couldn't contain his excitement at the thought of being the first to arrive, completely oblivious to the fact that the institution was closed due to Foundation Day. As luck would have it, a stunning and full-figured woman named Natsumi, who called herself "L" (Eru), suddenly appeared before him, and the two of them immediately hit it off, despite their noticeable height difference.
Shunsuke's mother operates a women's apparel business that desperately needs additional manpower. In an attempt to help out, Shunsuke volunteers to lend a hand, but struggles immensely due to his lack of knowledge on how to interact with women. Luckily, Eru steps in to assist with the shop, which excites Shunsuke's mother.
This story follows the ups and downs of the "SL" combination between Shunsuke and Eru, and their journey of romance.
