As the first episode unfolds, Akane arrives as a transfer student in Shinya's classroom, revealing herself as the bride to his elder brother while harboring a long-standing childhood bond with him. Their rekindled connection stirs deep emotions, prompting Sayumi, who is married to Shinya's other brother, to recognize their mutual affection and offer guidance on expressing love. Through her thoughtful lessons, Shinya gains the confidence to connect with Akane on a profound and personal level, marking the beginning of their shared journey.