Limit of Love: Umizaru 2006 one on netflix

A small team of Coast Guard divers, including Daisuke, rappels onto the ship from a helicopter and begins to evacuate the panicked passengers. Then Daisuke finds a familiar face – Kanna. They had a tiff the night before about their wedding plans – Kanna had already made her dress, while Daisuke was still reluctant to propose – and she left for Tokyo, feeling like a fool. Now she see Daisuke in a different, more heroic light – but before they can properly reconcile, she has to evacuate, while Daisuke searches for stray passengers.