
Yaichi (Ryuta Sato) is a single father and he raises his elementary school aged daughter alone. One day, a foreign man named Mike (Baruto Kaito) visits him. Yaichi has an identical twin brother Ryoji, but Ryoji moved to Canada years ago. They have disconnected since that time. Mike introduces himself as the husband of Ryoji. They are a married gay couple. Yaichi is confused and doesn't know how to deal with Mike.
Otouto no Otto is a Japanese drama of 18,099 characters, with 1,472 unique words and 657 different kanji. Its difficulty rating on Jiten is average, 2.3 out of 5. The full vocabulary list ranks all 1,472 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
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Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.