LOL really? do they become a couple at least?
yes, but actually no. black hair guy considers them boyfriends, white hair guy is still in denial. if you read in between the lines they're probably already dating, but the story itself hasnt made them fully official yet.
tell me that vol 2 Souichi “so your bother is the type who can get married, you should learn from him” is the same as vol 15 Souichi who gently holds Morinaga’s face in his hands and tells him “it’s not nothing!” when he tries to bash himself for being sad that his family still expects him to marry a woman.
im impressed by how practically nothing of any real significance has happened in this manga despite running for 20 years.