Showcase Your Skills!

Let's say MC is 15-16 years old. He is pretty normal, except not really popular, everybody makes fun of him. He only has one friend, girl, but lately she started hanging with him less. She couldn't afford to be mocked because of him, but she also liked him, so it was painful for her. MC noticed that and that made him hate everyone. Only thing he liked about his life were his dreams. Although random they were influenced by his everyday life so he dreamed of popularity and power. One day he witnessed strange accident. Car was lifted in the air just like that. That night his dreams were changed. He "woke up" in his world at the same time when accident happened, but this time car wasn't lifted by something invisible, no, there was giant monster, looked like crab, but covered with fur and it had hands, giant ones. Eyes were red, dark, like blood, eyes of a demon. Demon looked at him and attacked him. MC started thinking how much he needed something to defend himself. He started running, and then fell over something, scratching his cheek.
He looked at that and saw bazooka, he took it and shot the monster. Monster survived and continued attack, but MC was saved by other people who came and killed monster. They told him "It's time to wake up now, next time you go to sleep put this under your pillow" and gave him a paper with some kind of seal. MC wakes up thinking how real that dream felt until he noticed blood and pain on his cheek and piece of paper in his hand.
He knew something was off so next time he did as people in dream told him. He "woke up" in a house this time and was greeted by the same people. 3 girls and 2 guys his age. They explain to him that this house is their base, and that their role is to prevent demons of Astral (I'll use this name as it sounds cool) world to kill people in their dreams and from entering real world. But lately number of demons increased and more of them slipped to real world. Then they explained to him that last night he was transported back in tine because he was chosen to join them and to see what really happened. They said that they were surprised, but that from now on he'll fight in present time. He accepts and the story begins. Astral world is ruined world that can only be accessed through dreams. In that world they are overseers who can do anything if they are powerful enough. Their mission is to control demons. But demons are not too strong, so usually only one is needed, but something has changed. So six of them were gathered. We have massive fights, they cross from Astral world to real world were they destroy demons and they soon find out there is one demon who gained power and intelligence and now presents threat for those who live in Astral (yes there are people there, different than us) and real world. But no one knows that MC is actually from Astral world, he was sent to real world to be protected from demon by his father. Secrets are revealed he uses his powers, demon slain and he had to choose in which world he wants to live. Fights and awesome weapons, as you know in dreams you can make anything, you just need imagination It's not on the level of previous two, as something like this I never did, but I'll improve it, since I like the idea.

4 friends gather for sleepover, they watch horror movie with ofc zombies, guys scare girls (2 guys, 2 girls), one goes out on a terrace and sees figures approaching their house. They growl, and at first this is some kind of joke by his friends, but soon witnesses one neighbour being eaten by them. He tries to warn his friends, but they don't believe him, until one of the two girls ignores his warnings, and runs straight into them and dies. That girl is girlfriend of main male character. He is emotionally destroyed and wants to die along with her, but two remaining characters save him. They barricade themselves in that house until the morning, and through their conversations we find out little about them. That prologue and first episode, named "Night in the house"
Next morning zombies are nowhere to be found, and they manage to escape the house, and soon encounter 2 zombies attacking one girl. They somehow save the girl, but attract new zombies. They escape and decide they must survive, although they have no idea what is going on. Little by little their group grows in numbers, some characters die. Male MC finally finds new love in one of the girls they saved. So few episodes with missions to gather things needed to survive, until in one episode they find note in some dead scientists coat. It contains address and says: "Whoever finds this, go here"
Group goes and they find research papers which say that every 3000 years great apocalypse happens, and that some people think that it is so to purify the world. However there is only one way to stop it. All of a sudden there are new enemies. Heavy armored people who will do anything to stop them and leave zombies to purify the world while the chosen people are safely hidden. Again fights and quest to find things needed to stop them, journeys through ruined cities, fights. MC's new love almost dies, he gets angry, they can't treat serious injuries. But he finds out that zombie flesh can heal her, but it has negative effects. She will change. Will he accept it? Will they stop zombies? Find out if this gets animated...

We start of with MC, 17yr old, finishing 3rd grade. He lost parents some time ago and is disappointed, depressed and always sad. He hates life, many times wanted to finish it, but he wasn't strong enough and he hated himself for being so weak. His only interest was Japanese culture, and he spent whole days reading about Japan and watching anime. Very intelligent and smart, but his grades are not so good. One day at school he gets application form. Students who are finishing 3rd year can finish fourth and college in Japan but students with better grades are more likely to get that chance. He throws it away thinking that it is another way life is trying to mock him. He goes home and falls asleep. He never dreams except for one dream. He dreams him and lady in white in complete darkness and she talks to him, advise him. In the morning he wakes up and finds application form on his table. He fills it and somehow is chosen. But he is presented with new problems. He learned Japanese in his home country and understands it perfectly so he is put into all Japanese class. It is hard for him to adapt, but he finds salvation in a classmate (female) who is closed and depressed like him. First he is only curious but closer they get stronger his feelings are. He never admits his love. Then some episodes with their everyday life and he finds out that she has sister who can't walk due to car accident where their parents died. Then he finally found out that there are people like him, and judging by his friend it is awful, and only makes one suffer more. He is saved, but decides to help her too. Throughout the whole anime we have his dreams with white lady. He befriends her sister, they have the same hobby, drawing. He buys her tools for drawing, some sets and tells her, have this by your side forever. Then some more slice of life (to cut it short, I already have every episode planned) and we get to festival where three of them are attacked by some racist gang. He suffers minor injuries, his friend is comatosed only her sister is speared as she was in wheelchair.
His friends condition is worsening and he finally admits love but as soon as he told her that she died. He decides to take care of her sister. Yes, now there are two possibilities, he falls in love with her and they live happily ever after or this: Two or three episodes of their life in future after tragedy and in one they go to store, robber gets in and says "nobody moves" Girl screams, robber points gun at her but MC jumps in front and saves her. By some miracle she gets up and start walking. He says something like: "I am glad I saved you" as he blamed himself for his beloved death. Girl says:" Don't leave me too", but he answers " No, maybe I'll finally dream something different" and dies in her hands. Now two possibilities:
First one, extremely sad, he dies like I said and goes to that dark world(actually that is his last dream, or maybe something else, I'll leave it up to you), where he now sees his love and lady in white who is revealed to be his mother. They both reach out to him, he grabs their hands, darkness turns into light and it is over. Last scene is girl ( female MC's sister) that visited their grave (buried next to each other) and thanks them. Sad and tragic, but perfect romance, guess why?
Second possibility: He does not die, lady in white is revealed to be his mother, but also his guardian angel and she tells him that she may yet reverse past events, but only if he accepts his life, if he truly stops hating the world (as he never actually was saved, his beloved only diverted his thoughts) he is then presented with his life and finally realizes, starts crying, and suddenly wakes up in his bed on the day of the festival. He runs to his beloved's house and and hugs her. Then a kiss. He doesn't remember past events, previous life but he knew that was something he had to do, so they go to festival, but they are not attacked this time. And his beloved's sister goes to operation and starts walking and they live happily ever after.