Surikomi!

Kenta is a high school boy who has been fantasizing about a woman, ever since he got a peek of her panties during summer vacation in 5th grade. When his parents' house burns down, he ends up renting a room to live by himself. His landlady is Yumi, the woman of his fantasies… He also gets involved with a psychic girl from school, Miko. His days will filled with thrills and turmoil…?
(Source: Young Champion Web, translated)