Complex sentence: When she tells the council she plans to leave school early to study in the United States to become an astronaut, Yusaku is heartbroken that he dyes his hair and quits the council, and confesses his love for her in front of the whole school.
Split into simpler sentences: When she tells the council she plans to leave school early to study in the United States to become an astronaut, Yusaku is heartbroken that he dyes his hair and quits the council. NEED SOURCE, and confesses his love for her in front of the whole school.