Responses
One similar to that is “Sabishisugite Rezu Fūzoku ni Ikimashita Report“ Sorta ig becuase the MC has friends from highschool but she becomes a depressed recluse during adulthood. It focuses more on social anxiety and craving companionship (and it’s a yuri manga so expect girls love). Another one is goodnight punpun if you want dark coming to age without yuri!
Is there a manga where the main character graduates, loses all there friends, being social become difficult and approaching adulthood is fuckin hard because they have nobody to rely on ...