Kare Kano: His and Her Circumstances: v. 6 by Masami Tsuda
It's not long before Soichiro's back from a very successful tournament, much to Yukino's delight. Now they can spend some time with each other before school starts again. Yukino notices that Soichiro's matured a lot, which stirs up new feelings in her and makes her fall in love with him even more. Soichiro's feelings for Yukino deepen as well, and he has some difficulties dealing with that and some family issues.