Love Hina 2 ~Kotoba wa Konayuki no You ni~

The game's main focus is on collecting words for one of the five heroines from the series. You are Keitarou Urashima, the protagonist from the series, living together in a huge mansion with Naru Narusegawa, Shinobu Maehara, Kaolla Su, Motoko Aoyama, and Mitsune Konno. You can go to any one of their rooms and check the words you have unlocked for each of the characters, and by combining them start the event scenes which are similar to a visual novel in style with full voice-acting, for player character included. This game also requires PocketStation without which you cannot gather words necessary to play the game.

[From Mobygames]