From kimi wo hitori ni shite agenai scans:

“I won’t leave you all by yourself.” Chigusa puts up walls between her and others due to her lack of communication skills. While she’s always alone at school, a beautiful boy, who is also the rumored transfer student, arrives one day. He ends up being Iroha, the one and only person she thought of as a friend when she was little. And he said he transferred here so that he could see Chigusa…?! Iroha is the only one who hops over the wall that Chigusa built and keeps on closing the distance between them. A love story between a boy who loves as hard as he’s obsessed and a girl who’s all alone.