KURAGE NO SHOKUDOU

In the story, the protagonist finds himself lying on the beach one day. He is picked up by Arashi, who manages a restaurant called Kurage no Shokudou. When asked who he is, the protagonist tells a lie that he lost his memory — but he remembers everything, including the fact that his twin brother died. (Source: Anime News Network) — Description from AniList community (anilist.co).