The Player Stopped Using His True Feelings

The heroine's boyfriend died in an accident when she was a sophomore in college. The heroine couldn't accept it for a while and stopped classes for a year to do rehabilitation. The reason for my recovery was that I accidentally discovered that an NPC in the game looked similar to my boyfriend, so I transferred my concerns to the game. The male protagonist is this NPC, a company owner who just started his business. The male protagonist is a person who doesn't understand love. He has had a childhood sweetheart girl beside him since he was a child. His parents and other elders said that they are a perfect match, so naturally the two came together. But the male protagonist will be very calm about anything he does to the girl, without any disturbance in his heart. However, he who does not understand love only thinks it is because he is too familiar. Until he met the heroine, her appearance slowly made him feel that his heart and emotions were affected, and he slowly fell in love with the heroine as they got along...