DTC –Yukemuri Junjo Hen– from HiGH&LOW

Even though Chiharu has feelings for Mari, he recognizes that she and the inn manager Miyazaki are already attracted to each other. DTC chooses to help them because they want to secure a stable future for Mari and her daughter Megumi. The trio believes that by facilitating this marriage, they can give Megumi a father figure and ensure the inn's continuity.

Earlier, DTC notes the obvious tension between Mari and Miyazaki, which planted the seed for their plan.

In Japanese family law, if a widowed mother wants to remarry, the child often needs to formally accept the new partner as their parent. This step was necessary for Mari and Miyazaki to marry, which is why DTC's plan focused on getting Megumi to accept Miyazaki before the marriage could proceed.

The inn's manager Miyazaki had been waiting for Megumi's acceptance before pursuing a relationship with Mari.

Chiharu genuinely falls for Mari's strength and kindness, but he selflessly puts her happiness above his own feelings. He recognizes that Mari and Miyazaki are meant for each other, so he channels his feelings into supporting their union rather than pursuing his own romantic hopes.

Chiharu's immediate attraction to Mari was clear from the moment they met, making his choice to help even more meaningful.

DTC hatches a scheme to push Mari and Miyazaki toward marriage by creating situations that force them to interact and acknowledge their feelings. They rally their old friends, the Ryukibue brothers, SMG of White Rascals, and Daruma Babies, to add credibility and support to their mission, ultimately focused on getting Megumi to accept Miyazaki as her father.

The plan relies on Megumi's blessing, which becomes the key to unlocking the marriage.

After arriving in Kamishimo Onsen town, DTC discovers they have run out of gas and money. With no funds to continue their journey, they take live-in jobs at Moritaya Inn to earn enough money to get back on the road. This temporary situation leads them to meet Mari and Megumi.

Their motorcycles needed fuel, but their wallets were empty, a practical problem that changed their entire trajectory.

As DTC's plan unfolds, unexpected twists test their resolve and threaten to derail their mission. The exact nature of these obstacles isn't specified in the summary, but they create sufficient tension to make the outcome uncertain until the final moments when Megumi accepts Miyazaki's proposal.

The plan was described as reaching a turning point where failure loomed, creating genuine doubt about whether the marriage would happen.

DTC enlists their old friends, the Ryukibue brothers (Kabuto Ijuin and Ozawa), SMG of White Rascals, and Daruma Babies of Daruma Ikka, to add credibility and support to their marriage plan. These allies provide additional resources, manpower, and emotional backing that strengthen the mission's chances of success.

DTC had built relationships with these groups in previous adventures, making them trusted allies.

After Megumi accepts Miyazaki as her father and the marriage becomes possible, DTC collects their wages from their part-time work at the inn. They then continue their motorcycle journey, riding off with renewed energy and having learned valuable lessons about friendship, loyalty, and finding purpose in helping others.

From the very start, DTC was chasing youth and adventure on the open road, and the inn was always meant to be a temporary stop.