This is an easy piano solo arrangement of "Gotoubun no Katachi (五等分のカタチ)" by Nakanoke no Itsuzugo (中野家の五つ子) (Kana Hanazawa, Ayana Taketatsu, Miku Itou, Ayane Sakura, Inori Minase), the OP of the anime 5-toubun no Hanayome ∬ (The Quintessential Quintuplets Season 2).