Hotaru no Hikari: It's Only A Little Light In My Life

What is Marriage? Himono-onna's Resolution (2x11)

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In the final episode, Seno tries one last time, but fails to sway Hotaru to his side. The boss wins, but not without colleagues marrying in Miss Konatsu's now-open cafe first. Taiwan happens and ends and the couple finally end up in the same bed.