There's also 'Unexpected Affection'. In this fanfiction, the kiss between Deku and Todoroki occurs in a very tense and emotional situation, like after a big battle where they realize their true feelings for each other. The author does a great job of building up the anticipation before the kiss.
The contrast between their personalities. Todoroki is often more reserved and Midoriya is very passionate. When they come together for a kiss, it's like two different worlds colliding in a beautiful way.
I'm not sure about a specific 'todoroki and midoriya kiss fanfiction' off - hand. But you can try searching on fanfiction platforms like Archive of Our Own. There are likely many stories that might include such a moment, given the popularity of their relationship among fans.
Another way is to join fan communities dedicated to the series they are from, like My Hero Academia forums. There, fans often share and recommend their favorite fanfictions, including those with Deku and Todoroki kisses. You can also ask for specific recommendations in these communities.
His friends would probably take care of him. Midoriya would be very eager to help, using his kind-hearted nature. He would make sure Todoroki is fed and comfortable.
One idea could be that all his friends at UA plan a surprise birthday party for him. They decorate the common room with his favorite colors, blue and red. Another plot could be Todoroki spending his birthday with his family, trying to reconcile with his father on this special day. Maybe he receives a heartfelt gift from his mother that has a deep emotional significance.
Todoroki's character development in time travel fanfictions can be quite profound. He may start as a somewhat aloof character, but through time travel, he begins to understand the importance of relationships more deeply. When he travels back and witnesses the relationships he could have had or lost, it makes him cherish the ones he has in his original timeline. His view of heroism also evolves. He realizes that being a hero isn't just about using his powers but also about making the right choices at the right time, which is especially highlighted when he has to make decisions that could change entire timelines.