eren losing his smile

Well, it could have completely changed the course of the story. Maybe he would have used his powers more strategically or made different choices that affected the outcome.

He took it with a smile. The smile was all over his face.

There were a few novels that involved the plot of Master losing his identity. These novels included "Master's Horse Loses, Substitutes Become Normal","Master's Avatar Can't Drop [Book Wearing]","Master, Your Avatar Dropped!", "Master, you've lost your avatar!","Master, you've lost your avatar!", "Master, you've lost your identity!" "After stripping off Master's identity, it's actually Little Senior Brother","Master, Your Identity Has Lost (Ji Zhaoxing, Shen Hanting)","Master, Your Identity Has Lost","Villain Master Has Lost His Identity [Transferring Books]". These novels covered different topics and plots, and could be read according to personal preferences.

Well, in this situation, the light could be both a help and a hindrance. It's a help because he should be able to see better than in the dark. But perhaps the drunk man's vision was so blurry that he couldn't make out the keys even with the light. He could have left his keys at the last place he stopped before getting really drunk, like on a table near the bar.

There's 'One-Punch Man' where a character briefly loses his vision due to a powerful attack. But it's not a central plot point.

This novel was called " Master Jun Was Tricked Again." The male lead, Jun Qimu, was blind due to his poor health. The woman he loved left him, but his mother found a voice to ask his girlfriend, the female lead, Ye Ning, to take care of him. The female lead, Ye Ning, was a talented voice actor. While taking care of Jun Qimu, they started to get closer to each other. I hope you like my recommendation.

Well, Eren shows his love for Mikasa in a rather unique way. His actions, like when he gives her a certain look that shows he cares about her more than he lets on. He also includes her in his grand plans in a way that indicates he wants her by his side. Even though he has a lot on his mind with the fate of the world, he still makes room for Mikasa in his heart. And when he defends her or stands up for her, it's clear that his love for her is real, even if it's not the most obvious or traditional form of love.

Well, in eren and annie lemon fanfiction, Eren may be depicted as having a strong, almost obsessive attraction to Annie. His character might be written to be very determined in his pursuit of her. Annie could be presented as having a complex mix of emotions. She may initially resist Eren's advances due to her own guarded nature, but then gradually give in. These characteristics are often used to create a more intense and emotional relationship dynamic in the fanfiction. However, it's important to note that this is a departure from the official story and is the creative interpretation of the fan authors.

Eventually, Eren might start to investigate the reasons behind Mikasa's betrayal. If he discovers that there are more complex factors at play, like she was forced or there was a misunderstanding, he could feel a mix of guilt for his initial reaction and relief that their relationship wasn't as broken as he thought. However, if he finds out that she truly betrayed him out of her own will, he might become even more determined to carry out his plans, whatever they are, without her.

In some versions, it was due to a chemical accident. But it varies depending on the comic storyline.