Hey OrangeMango! I just finished reading your comic. I'll give you some feedback based on my observations.
Cover Page: The cover page is the first thing your readers are going to see, and let me say that it's done very well! The title is clear and easy to read, and the colors of black, red, and white go nicely together. However I would consider typing out the whole word for "Chapter". I feel it will give your work a more professional look and draw more people into reading. The art is appealing, and simplistic, but it already gives us a good idea of the style you're going to use. The only critique I would give on this is the main character's familiar. While you did a fantastic job with your human character's art, the familiar feels a little out of place in comparison.
Grammar: Spelling was mostly consistent. The only error I could find off the top of my head was the word "enrol" (during the protagonist writing in his journal) should be spelled "enroll". Some sentences lacked the appropriate commas. Also, I would be cautious about using ellipsis too much (the set of dots at the end of sentences). When I see an overabundance of ellipsis, I get the sense that everyone is lost in thought, including the writer. The best advice for this is to use ellipsis RARELY.
Art: I can see a great deal of time and effort went into making this. You give your characters different faces and from the two characters we have been introduced to, they show different emotions - great job with this! Your human characters are turning out nicely, but I'm still uncertain what the protagonist's familiar is supposed to be. I'm assuming it's a spider, though the ears throw me off a little. There is some inconsistency with hands, but don't beat yourself up over those limbs too harshly. Every other artist in the world has struggled with hands, and its something we all strive to get better at. I encourage you to challenge yourself to draw hands in different and unique poses throughout the course of your comic. You'll be amazed at how quickly you'll improve!
Story: There isn't much for me to comment on as far as the story line goes. As of right now, we know the protagonist is searching for his missing sister, and in order to accomplish this task, he joined a prestigious school to find clues to her whereabouts. This is an interesting plot line and I'm curious as to why it was so imperative the protagonist's mother wanted him to keep a journal. What happened to his sister? What is the significance to having a familiar? Is there magic involved? What other kinds of hybrids, such as Silver, exist? These are great questions that you want your audience to ask themselves as this is essentially what will keep your readers coming back for more.
The biggest set back I'm seeing is the repeated way your characters refer to the protagonist as "Edgelord". Once I read this, I felt the comic was more of a parody than a serious story. If you're wanting this to be more of a joke towards other manga comics, then this is a great way to start, but if this is truly meant to be serious, I would caution against the continued use of this.
One last minor note is the way you put information regarding your story in the description of your second page. Telling us Silver is a wolf/human hybrid is something that could be done in the comic. People don't often read the description, so if this information is important, some might miss out on it!
Overall, don't be discouraged by this feedback. This is only one person's opinion. If you choose to listen to any of this, then that's great, if not, that's also great! Sengoku=Project is YOUR story. Do with it what you want!
Keep up the hard work and I wish you luck!