son of last hope and stars

For a boy who found out that his loved ones slept with his bully he should feel despair , anger , sadness and rage and yet he feels happy as if he finally was relieved from a burden and when he found a letter from his " father " he discovered certain truths that's been kept from not only him but the women of his family now he is on a journey to show them his power but with a yandere ex sister , a whore ex girlfriend , a former kouhai and ex mother on his tail his journey will not be easy