Toradora!

Таига возвращается спустя год, что приводит к растерянному признанию и удару головой от Рюдзи.

After hearing Taiga's fake voicemail message, Yasuko arrives at Ryuuji's grandparent's house, where Ryuuji is waiting. Yasuko makes up with her parents and tells Ryuuji that his father ran off while she was still pregnant, and she gave birth to him. Ryuuji decides that he and Taiga should not run away, and instead get married with everyone's approval. They have a rehearsed wedding at night in their room where they share their first kisses. They all go home, but Taiga, after listening to her mother’s exasperated voicemails, decides to go back to her because she does not want to run away from her problems. Minori is not happy that Ryuuji lets her leave, but he has come to terms with everything. Taiga sends everyone a mail with a picture of the night sky and a single star, and Minori feels that this is supposed to encourage them to do their best. Everyone gets together to send a group picture to Taiga. Over a year later during their high school graduation ceremony, Taiga comes back and Ryuuji finds her in a locker in the classroom. When he finally confesses to her, she becomes flustered and headbutts him. (Source: Wikipedia)