My Dress-Up Darling 15

After multiple twists and turns, trials and tribulations, it's official: Marin and Wakana are dating While neither their families nor their friends are surprised by the announcement, the happy couple are eager to celebrate their mutual feelings with a heap of outdoor activities Eventually, the two find themselves back on the beach where they made a fateful promise one year ago. What new vows will they exchange under the shining sun in this final volume?