“Muchu (夢中)” by BE:FIRST is the official theme song for the 2025 Japanese drama Nami Uraraka ni, Meoto Biyori (波うららかに、めおと日和), starring Yoshine Kyoko and Honda Kyoya. Produced by eill and Ryo'LEFTY'Miyata, the song blends a warm gospel-inspired arrangement with BE:FIRST’s rich seven-member harmonies.

Set in Showa 11 (1936), the drama depicts a bittersweet newlywed life beginning from a zero-day dating marriage. Rather than dramatic romance, the story highlights love cultivated through daily rituals and quiet emotional growth. “Muchu” mirrors this theme by portraying devotion that exists both in passion and in peaceful domestic exchanges.

The word “Muchu” signifies complete emotional captivation, while “Shirokujichu” (四六時中) intensifies that meaning into 24-hour devotion. The seasonal word “Uraraka,” embedded in the drama’s title, is a spring kigo symbolizing gentle sunlight and renewal—imagery that softens the song’s emotional depth.

In this episode, we explore the linguistic nuance, cultural symbolism, and the way BE:FIRST bridges Showa-era tenderness with modern emotional clarity—without revealing the full lyrical breakdown.

📝 Full written analysis: https://www.japanlyricroom.com/songs/muchu

⏳Chapter0:00 Intro: BE:FIRST "Muchu" Analysis - Song Meaning & Story Background2:56 Phrase 1 Lyrics Breakdown: Secrets of Hidden Emotions & "I love you"4:56 Phrase 2 Meaning: The Emotional Roller Coaster of Love6:42 Phrase 3 Cultural Tutorial: "Uraraka" & Seasonal Word Meanings8:31 Phrase 4 Lyrics Explained: "Muchu" - The Benefit of Loving 24/710:06 Phrase 5 Japanese Context Review: "Tadaima" & Everyday Happiness11:44 Phrase 6 Breakdown: The Blooming Flower of True Love Story12:59 Phrase 7 Lyrics Meaning: Wiping Tears & The Act of Devotion14:16 Outro: Emotional Summary & Final Thoughts on Muchu📝 Q&A for "Muchu (夢中)" by BE:FIRST🌸 Q1. What is the meaning of the song "Muchu" by BE:FIRST and its connection to the drama?A: "Muchu" (夢中), which translates to being "obsessed" or "captivated," serves as the theme song for the 2025 Japanese drama Nami Uraraka ni, Meoto Biyori. The lyrics beautifully mirror the drama's setting in the early Showa era (1936), depicting a "zero-day dating" marriage. Produced by eill and Ryo'LEFTY'Miyata, the song blends gospel-inspired harmonies with lyrics that celebrate a deep, soul-level affection found in the simple routines of newlywed life.🎢 Q2. How do the lyrics of "Muchu" express the Japanese concept of love and "Shirokujichu"?A: The song uses the idiom "Shirokujichu" (四六時中), which literally means "24 hours a day" (4x6=24), to show that the loved one is always on the singer's mind. It balances the excitement of love—described as a "roller coaster" (roller coaster)—with the peaceful stability of daily life. Key Japanese expressions like "Tadaima" (I'm home) and "Okaeri" (Welcome back) are highlighted as sacred moments where happiness "bounces back" and grows between a couple.☀️ Q3. What is the significance of the word "Uraraka" in the lyrics and the song's title?A: The term "Uraraka" (うららか) is a traditional Japanese Kigo (seasonal word) for spring, describing soft, radiant sunlight. It appears in both the song lyrics and the drama's title (Nami Uraraka ni). In the context of BE:FIRST’s "Muchu," it signifies a heart that has found peace and warmth. The song suggests that while eras change from Showa to Reiwa, the "spring-like" devotion of being completely "Muchu" (in a dream/infatuated) with someone remains a timeless human experience.

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