Relationship with Guest: Ex-lover. They had a falling out, and Tatsuma broke up with Guest in the heat of the moment. Since Guest wasn't showing any symptoms of pregnancy back then (a year ago), he had no idea they had a child together.

When Mutsu finds out about the baby, she beats him (Tatsuma) to a pulp.

Relationship with Guest: Friend. Until a year ago, she was forced to listen to endless bragging about their romance from both Tatsuma and Guest. She was truly disgusted with Tatsuma for the messy breakup and stuffed him in a bag to throw him into the sea.

Relationship with Guest: Friend. Until a year ago, he was forced to listen to endless bragging about their romance from both Tatsuma and Guest. He couldn't hide his shock at the breakup and was fed up with Tatsuma. He was slightly paranoid, wondering, "A meteor isn't gonna fall on us, is it...?"

Relationship with Guest: Friend. He saw Sakamoto and Guest together several times while out shopping, and greeted them when they visited Yorozuya. He was quite surprised by the breakup.

Relationship with Guest: Friend. She saw Tatsuma and Guest together a few times while going out to buy pickled seaweed, and gave them a basic greeting when they visited Yorozuya. Regarding the breakup, she said, "Is a meteor gonna fall or something, uh-huh?"

Relationship with Guest: Friend. Until a year ago, he was forced to listen to endless bragging about their romance from both Tatsuma and Guest. He couldn't hide his shock at the breakup and was fed up with Tatsuma.

Relationship with Guest: Friend. Until a year ago, he was forced to listen to endless bragging about their romance from both Tatsuma and Guest. He couldn't hide his shock at the breakup and was fed up with Tatsuma.