Four couples. First three work at the same hairdressing shop. The third is the owner's story (in the past I guess?) The fourth is unrelated to the rest.
1. A practicing hairdresser and a distrustful salary man. Quick paced and I didn't feel that tension that led to a confession.
2. Re encounter between childhood friends. The hairdresser relieves his friend because his hair is sensitive. At least there is tension here.
3. At a reunion, a gay (the hairdressing shop owner) and his friend get drunk. The next morning, the gay's drunken confession surfaces which he has to confront while sober.
Fourth, he sees red strings as a farewell gift from his grandmother. He knows that his string is connected to his friend, who then confesses. Troubled by it, he tries to evade him but ends up following the string to clear things with him.
Wagamama Basic